Definition: Estimated time of arrival (ETA) is the time interval at which a certain vehicle will arrive its destination. I don’t know who manufactures it. According to the positional relationship of stop site and adjacent GPS projection points, the bus arrival time could be estimated too. They do not make any allowances for changes in current expected during the passage. So to answer the "Do we need more data than these?" Initial ETA at a stop is time of last stop plus most recent travel time average. We share ETAs with restaurants and customers so they can prepare accordingly. How could you improve it? This model can be used for other navigational modeling activities as well - you can model sea navigation, with the points being harbors and the segments being the shipping lanes, or model air travel, with the points being airports and the segments representing existing flights, so e.g. It assumes you are just about to resume driving at (or above) the speed limit. This is worst downtown when you have a red light every couple of blocks or so. Travel Time Estimation (DeepTTE) to estimate travel time of the whole path di-rectly. If you’re driving 1500 miles across the country, but need to go a while on residential city streets to reach the freeway on-ramp, you wouldn’t want your navigation system assuming that you’ll be making the whole trip at 25 MPH. Instantaneous speed for GPS units is typically based upon doppler shift of the received signal, whilst more accurate long term speed averages are calculated from location fixes. The good quality systems have data bases including speed limits for all the roads, and often some empirical speed estimates of what is possible. Website or program that creates puzzles from blunders in your past games. Improve customer service with a better estimate of arrival time and provide alerts to customers when drivers encounter unexpected delays. During a day, a manager may see the progress of work for every employee. Integration of the current AdrenaShip's smart ETA function works by integrating the effects of the current on a vessel's progress. Your ETA is back calculated out from this. GPS satellites simultaneously transmit synchronized time and orbital data to Earth. You can also weight by raw distance, or by estimated fuel consumption if those are more important, e.g. GPS receivers compute location using orbital data and the difference … When would that solution fail? I'm getting a callback with latitude and longitude, how can I best calculate “current speed”, and other derived values? This is worst downtown when you have a red light every couple of blocks or so. How to transform this logical if-then constraint? Posted on June 27, 2016. you can model a map of the world’s airports and flights and determine the cheapest way from Brasilia to Vladivostok (e.g. I don’t think it ever considers how fast you’re actually driving, strictly the distance remaining on the planned route (and the fixed nominal speeds for each segment of that). If I plug in the traffic data receiver, however, the ETA tends to be rather unreliable as it will suddenly add on 90 minutes to the journey time because of a traffic jam on the route, that usually turns out not to exist…. it is really messy when dealing with the logic behind. remaining time = (avg time)*(curr. rev 2021.2.23.38643, Stack Overflow works best with JavaScript enabled, Where developers & technologists share private knowledge with coworkers, Programming & related technical career opportunities, Recruit tech talent & build your employer brand, Reach developers & technologists worldwide. According to them estimating the travel times of individual segments to calculate the travel time of the whole path produces inaccurate predictions. Sorry for being dumb, i really want to get things clearly. Off the top of my head, taking time zones into account for long drives; storing info when a user always deviated from a route in the same manner and using that for planning future routes; etc. How to draw a “halftone” spiral made of circles in LaTeX? !” The problem is that all it has is a picture of a road, just like it has pictures of railroad tracks, rivers, etc. If there is a travel delay along the route, the estimated time will show the arrival time to be later than anticipated but is still only an estimated time. The position accuracy is primarily dependent on the satellite position and signal delay. Which only makes for an overall increase of 1.5%. If you have traffic data, add time to segments where traffic is bad. It starts off by using rough approximation based on your distance from your destination, and perhaps, at first (and like Google Map’s directions) establishes an ETA based off the mph data for your particular course. When you enter your destination the GPS gives you a time remaining for your trip. The metric is a personal number based off your recent ride history of rides exceeding 10 miles (16km) that represents the estimated moving time for the route. Kalman Filter? so traveling by local roads or highway, the first estimate would be it's a matter of distance / speed. That’s how it does it. if the gps unit wants to be closer, it'll use distance remaining / your current speed Can vice president/security advisor or secretary of state be chosen from the opposite party? Maybe I am thinking that the proccessing power of your average Tom Tom is greater that it is, but it doesn’t seem like to would be that difficult. It does not assume you will travel the speed limit; it seems to assume you will be somewhat over it. Calculate how much time the bus needs to reach the next stop, then add time to reach destination according to schedule. 4 years ago. Estimated Time The Estimated Time feature is a metric for Premium and Basic subscribers that will give you an estimated moving time for all of your routes. The problem is,how to implement and what is the algorithm in ETA implementation. What if there are lots of traffic lights between 2 stops or different speed limits. But only after steadily traveling at the increased speed for more than an hour and even then it only got a minute or two earlier. You need four satellites for a basic fix, with additional satellites providing increments in accuracy in the face of sub-optimal geometries of satellites. Also, Tell him to touch the screen where the arrival time, distance to destination is located and that should bring up the option to change how it is viewd. By the way, this is why the VDO system displays some minor roads as gray instead of black, and shows “Correct guidance not possible” on the screen and says “You are not on a digitized road” if it is currently giving directions. Easy peasy. To learn more, see our tips on writing great answers. level 1 Simple math. I’ve thought about this as well. Did Moses worship Egyptian gods while living in the palace? This is more an issue when the terrain blots out parts of the sky than limitations of the receivers. If you drive faster for an extended period, the ETA will indeed creep in sooner, but it’s not because you’re going faster, it’s because it’s constantly being recalculated against a shrinking distance. I don't think that you can do better with a single GPS, without using global trafic data. I'm guessing you are talking about busses in a city, where GPS signals are weak and bus stops are not far apart. A GPS receiver monitors very weak signals from four or more Global Positioning System satellites, and thus using complex math dealing with time and the position of the each satellite the GPS receiver can calculate your position which, at best, is within a … The map data disc in the navigation system has information about the speed limits on roads, as well as things like the average speed, turn restrictions / one way, etc. GPS units can very accurately know your current speed, but it's unclear whether some factor that in when calculating your ETA. (For instance if they are all in a line in the sky, accuracy in the direction of the line is very high, and awful at right angles. Because of traffic and not-straight lines, distances and speed alone are not reliable indicators. Edit: This could be further improved with data about current traffic. Powered by Discourse, best viewed with JavaScript enabled. The estimated time of arrival (ETA) is the time when a ship, vehicle, aircraft, cargo, emergency service or person is expected to arrive at a certain place.. Overview. 0 0. Join Stack Overflow to learn, share knowledge, and build your career. It’s quite satisfying. i don't know if that would be the case as what if there is an accident happened? Yes, I do know that a short increase in speed isn’t going to affect the time, but I would figure that if you increase your speed by 20 mph for a 1/2 hour that it would recalculate the time remaining based on your current speed. In CS, what do you call this type of problem? Connect and share knowledge within a single location that is structured and easy to search. surely it should know that if the trip still has a hundred mile left, it’s not going to be done in an hour – or whatever. You have a picture of the road on the screen! However, if you regularly arrive significantly after the ETA, you may risk losing … The issue is that the traffic feature wasn't even enabled at the time. Google Maps and iOS use data related to traffic reports from Waze. If i would like to implement a relatively precise ETA that react to real life such as traffic jams/accidents > increase ETA, what are the minimum data that needed to be used? How to center the caption of a tikz figure ignoring text nodes? Averaging? How do I total several columns up to a certain point? if you are mapping a mountainous area and want to avoid driving up to the top of a mountain if you can, not because it takes a lot of time, but because it wastes fuel. Intersections are treated as points, and the line segment between the points is “weighted” with an estimate of the real-life amount of time it would take to drive between the points. If there isn’t enough time (based on clock cycles and memory available) then you can search only parts of a graph and come up with a best-available estimate. I've only had my car 1 1/2 weeks, but I'm noticing that when using the GPS the estimated time of arrival is way off the mark. With frequent GPS tracking updates, a dispatcher or fleet manager can get an accurate sense of where a vehicle is and when it’s expected to arrive at its destination. a true gps unit figures your location, movement and speed based on the time it takes the signal to travel between your unit and the satellites. In my experience it usually starts off with a rather conservative estimate, such that on clear roads you can usually shave off 7 or 8 minutes per hour. I’m a programmer. While we rely on you to make timely deliveries, road safety should always come first. Anyway, whenever any changes were made to the way the VDO system worked to make some set of vocal users happy, another set would start complaining about what changed. I spend a couple of hours shaving 15 minutes off of my arrival time and then the wife or daughter needs to stop to use the restroom. However, the problem is that the GPS datum will jump quite wildly and hence the First road bike: mech disc brakes vs dual pivot sidepull brakes? The GPS said almost 5 hours, which I knew was wrong. 0 0. Thanks for contributing an answer to Stack Overflow! I mean are you using your cell phone or an actual gps unit? Therefore it occasionally routes me onto secondary roads when a slightly longer highway route is much faster. I like to look at the time estimate and guess what time I will actually reach my destination. I say that because the old streetpilot gave me "correct" estimates while so far the Nuvi is giving "incorrect" estimates. You can weight by monetary cost, e.g. I think that your best bet is to use the history of the line to compare the current distance with the average distance at that time in the line, and to deduce a deviation from the average ETA. If you have continuous GPS data, you can adjust in real time from that. it depends on the software and hardware in your GPS unit. It’s an extremely useful app for travelers because it helps identify the estimated time of arrival (ETA), details of routes and other information about various locations. In the Uber partner app, the directions you get to a delivery pickup and dropoff each have an estimated time of arrival (ETA). $\endgroup$ – digiogi Sep 23 '14 at 18:24 Almost all satellite navigation now uses the Global Positioning System (GPS). And it is important to have exact time of the atomic clock of gps on my phone. My TomTom recalculates the time on the fly, as well. question: yes, i think you do. Yes, that's a good point. If remaining time = (total time)*(total dist-current dist)/(total dist) then i understand very clearly. To determine the best way to get from arbitrary point A to arbitrary point B, you search the graph. 5 years ago. Most can find the satellites they need so long as they are visible.) Anonymous. The algorithm is simply to use a rule of three to project the ETA by comparing the average distance in the history at the current time with the real-time distance. As an example, people complained that the “official” name of the road wasn’t being displayed, instead the common name was displayed. As others have said they rely primarily on set values (road speed limits) to compute an ETA and it will only start to vary with a *major *anomaly (like a very large & unrelenting speed change). Basically, a simple way to model a road map is with a weighted graph. All of this comes together to compute a (hopefully) somewhat accurate estimated time of arrival (ETA). Since when is Shakespeare's "Scottish play" considered unlucky? The time till arrival option should pop up and he can then choose that setting. I explained to her that the GPS systems are getting their time from SATELLITE, distinct from your vehicle clock or wrist watch which is governed by a battery. Do you know if there are any open toolkits/code snippets/etc that specifically address it? Initial ETA at a stop is time of last stop plus most recent travel time average. how to make navigation with 3-axis accelerometer and 3-axis gyroscope and gps, calculating accumulated distance using GPS(cannot call run method), Prevent estimated time of arrival degradation with Android GPS, Kalman-filtered GPS data is still fluctuating a lot. Algorithm about ETA (Estimated time of arrival), Podcast 315: How to use interference to your advantage – a quantum computing…, Level Up: Mastering statistics with Python – part 2, Opt-in alpha test for a new Stacks editor, Visual design changes to the review queues. My thoughts: Even if it pays no attention to instantaneous speed. Bad time to raise the issue. /** Use Google's directions api to calculate the estimated time needed to drive from origin to destination by car. Sign in. On a 5½ hour trip as I drove consistently above the speed limit on an interstate (about 78-80MPH in a 65) I did see my ETA start to get a little closer. 3. It uses posted speed limits on the roads that you will be traveling on. Which, out of nine hours, would be about eight minutes. What is your problem?!? speed and use stop's distance to calculate ETA. GPS signal speed is 300.000 km per sec. It doesn’t have data that ties that road into its navigation database. Try to start simple. Waze is available for tablets and smartphones that support GPS. Have heard of those but does not really know what to do ESPECIALLY Kalman filter! The government distributes UTC as maintained by the U.S. With traffic not being an issue. If you can just read from the GPS position if the bus is on a stop or between two stops you should be able to make a fairly accurate prediction. ETA = distance / speed. What are the equations and formula needed in predicting the ETA in the end. Just doing a little quick math, you only increased your speed 30% (from 65 to 85MPH) and for only about 5% of the whole journey (half an hour from a total of say maybe nine hours?) Broken downed Question: How to smooth the GPS datum? 0 0. You find the shortest path between A and B and the “weight” is your time (generally, it is the “cost”, which here, is measured in terms of time). The method of shipping can be via air, ocean or by domestic shipping services such as rail or truck. You can sign in to vote the answer. Estimated time of arrival (ETA) is the date and time that a shipment is predicted to arrive at a specified destination. so with google's method of calculation plus the default's GPS delay information, you can calculate your speed of movement, hence it compare with the destination distance and return back the time of your estimated arrival. The frustrating part is that it does not make any allowance for time at red lights or stop signs so it is overly optimistic about travel times on local roads. If it doesn’t make a reasonable ETA based on remaining distance and a reasonable speed estimate, it is failing. Most phones use the same system. The point is that stopping for an extended period, for whatever reason, does not seem to update the ETA in a reasonable fashion. I can’t address the Garmins, but I can provide some info on the VDO systems (as found in some previous-generation BMWs, for example). Derive an expected travel time between stops from this historical data to use as a baseline. Glympse is a fast, free and simple way to share your real-time location and estimated arrival time using GPS tracking with family members, friends or co-workers! It’s possible to do an approximation using knowledge of cell phone tower locations, and some phones will do that…but in general, your phone will use the same satellites, in the same way, that a dedicated GPS unit will. I have had four GPS units over the last 10 years. maybe adding weighted between real time calculations and bus schedule helps? Lyla. So the lag is smaller than a second. spark240 has it. The data in the system is pretty damn good. Well, in Passaic County, NJ it seems like a quarter of the roads are County Road 511. i already have the distance data between stops, the distance between 2 coordinates are the bus movements which i used to calculate the remaining distance. In the basis of arc sections making up, the bus stop could be determined by judging whether the bus stop is between two continuous GPS points. I don't think it's that simple. It didn’t seem that the GPS ever adjusted the arrival time to coincide with the increase in speed. Why did Umbridge hate Muggles/half-breeds? It wouldn’t make any sense to base the calculation on your current speed. Consider, you can stop, and the ETA doesn’t rapidly climb toward infinity; it just pushes out one more minute for each minute you’re parked. so at first: I tried to simply get distance from 2 GPS coordinates to calculate Signal arrival time measurement The position calculated by a GPS receiver requires the current time, the position of the satellite and the measured delay of the received signal. Naval Observatory (USNO) via the GPS signal in space with a time transfer accuracy relative to UTC(USNO) of ≤40 nanoseconds (billionths of a second), 95% of the time. and hence reduce the actual ETA as time passed by. All GPS units work in the same manner, those in cell phones are one chip wonders that are not as able (fewer channels, poorer noise specs, slower processing) as the chipsets found in higher spec dedicated units, but they all work the same way. 5 years ago. It stuns me but it can’t always account for the guy with a flat tire that blocks traffic for a bit. The recent solar flare may be causing problems with GPS. How to handle accidental embarrassment of colleague due to recognition of great work? Waze estimate 45 + 34 + 39 = 118 minutes vs actual 50 +34+ 43 = 127 Waze under estimated time by approximately 8% with 92.9% of the actual time on … How to plot the following graph using TikZ? Estimated Time of Arrival Calculation My girlfriend literally asked me that on the weekend when we arrived two minutes behind what the NUVI 360 posted. this can be continuously updated. By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy. ETA is all about distance/speed, arival times? And I had requested the fastest route. And you have the gps coordinates so you can calculate distance, but that isn't the distance over the road. Really, please, people, I’ve been in GIS before it was called GIS (it was AM\FM [Automated Mapping and Facilities Management]). Unix sed command to replace brackets in file. reducing the average speeds in its calculations during periods of high traffic Estimating time of arrival using GPS service. What could be a simple solution? However just to see I went about 30 miles at the posted speed limit of 65 miles an hour. The estimated time will also get more accurate to the actual arrival time as you get closer to the destination. The recent solar flare may be causing problems with GPS. just simply ignore the traffic light i guess, i also have the data of the bus stop's coordinates, does that help? The more satellites your unit can see above the horizon, the more accurate your reading will be up to the limits set by the DoD. What happens to Donald Trump if he refuses to turn over his financial records? What’s the point in constantly computing your ETA over sufficiently long trips, when the variable of driving at +/- 20 mph of the speed limit, over the course of several hours, would be giving you ever shifting and inaccurate estimates? You can't predict future accidents, but if an accident happens in front of the bus, the ETA will start to slip as soon as the bus slows. A specified destination depends solely on shipping terms, but typically is referred to the named seaport or airport. This Set depart and arrive time option will now enable car users to set the departure time, the date and also the estimated arrival time at the destination. One of the more common uses of the phrase is in public transportation where the movements of trains, buses, airplanes and the like can be used to generate estimated times of arrival depending on either a static … A map that displays this isn’t particularly useful, so the change was reverted. Anonymous. Embedded IoT: local data storage when no network coverage. When did AOL start offering Internet email? Collect travel time data from stop to stop on a continuous basis. The accuracy or your position isn’t going to be much of an an issue. Timofey Temlyakov. saying that a flight from NY to Chicago costs x dollars, and a flight from NY to Toronto costs y dollars. In fact I’ve seen this. Today I embarked on a 3-hour drive. For really screwball routing, combine either a very old map with new software, or vice versa. It’s safe, temporary and secure – and Glympse recipients don’t need to download an app to see what you share. and upDATE next stop when stopDis<0 Asking for help, clarification, or responding to other answers. I'll continue to looking for how gps receivers get rid of time lag and find out the exact atomic clock time. Me too. The historical data could help in estimating the ETA, but in real life traffic conditions varies, the best way is to implement the historical data such as bus schedule and real time calculation. I would assume that because the GPS can measure the speed at which you a traveling that the arrival time would be very accurate. what kind of gps are you using? Real time calculation is really important as all i want is a relatively precise ETA that changed in real time. There are a bunch of things that could have been improved. Hello Everyone, but your equation seems to have 2 unknowns in 1 equations? simply comparing the bus schedule won't give me actual ETA if something happens during the journey. Then, once you get close enough where your varying velocity doesn’t make much difference, and the extra computing necessary will be short lived, it then switches over to calculating your speed by checking your location over time, at close enough intervals to narrow in on your arrival to the minute. It is a transportation term that defines the time remaining for certain aircraft, automobile, ship or emergency service to reach the place it is directed to. Matching with the bus stop and estimating the bus arrival time. This is offset by stop lights/signs, traffic, etc. You still have to calculate the distance the bus really needs to travel not the direct distance between 2 coordinates. But because of the huge outcry whenever anything was changed, the software stagnated and hasn’t seen an update in years. Like in similar products, Google maps ETAs are based on a variety of things, depending on the data available in a particular area. Source(s): mapquest figure estimated travel time: https://tr.im/BdjSg. That’s not really the point. The three Garmins all estimate your arrival time based on the speed limits of the roads you will be on. I do know that the gadget will eventually re-adjust the arrival time as you near your destination. Things like Google Maps and TomTom have access to frequent updates, from their map data providers and/or from users reporting errors. pbmfixs : If he is in a different time zone he will need to be sure the GPS is in the right time zone as well. If you have continuous GPS data, you can adjust in real time from that. What Does Estimated Time of Arrival (ETA) Mean? How to make use of these data to calculate the ETA for customer? or comparing the calculation and schedule to choose between one of those? Hopf algebra with a non-grouplike invertible element. GPS systems are able to provide ETA information that is calculated on a vessel's speed over ground and the distance to travel. Derive an expected travel time between stops from this historical data to use as a baseline. The GPS built into my 2009 Toyota seems to estimate the same way but is somewhat more conservative, and I consistently beat the estimate by 5-10%. It will come up with things like sending you from Newark, NJ to Hartford, CT by zigzagging across every block in Manhattan. Making statements based on opinion; back them up with references or personal experience. speed calculated is really messy. it knows speed limits. But that makes things more complicated. I apologize if my question is a bit confusing, I am tired after the long trip. I am working on bus ETA projects where all the datum i get are: My Big question is: use the gps data to calculate the distance travelled, and hence using the remaining distance between stops to times the portion of time needed? The navigation software (which isn’t on the disc, but is in flash memory in the navigation system) also takes into account things such as penalizing local streets due to low speed limits, stop signs, traffic lights, and so on. When using the speed information from the GPS, the arrival time at the stop point will be infinite if the vehicle is stationary. The distance of the gps around 30.000 km. How does GPS calculate est. Well, how good is "good enough"? Changing Legend Symbology to include a 'Sum' field using QGIS 3.16.3 Python Console. should you pick Brasilia->San Juan->New York->Berlin->Moscow->Vladivostok or Brasilia->Mexico City->Los Angeles->Honolulu->Tokyo->Vladivostok?). When you drive over the posted speed limit, you are ahead of the average. Collect travel time data from stop to stop on a continuous basis. So this is just a general arrival time. How do you think about the answers? dist)/(avg dist), What is the average time/average distance you mentioned. Even though I don’t need to be there at any particular time, I still get upset because her piss break caused my two hard hours of driving to be for naught. The same question comes up again. Then I increased my speed to about 85 mph for about another 30 minutes. I just got back home from a 600 mile trip and on the way I kept looking at my GPS and got a bit annoyed. GPS time transfer is a common method for synchronizing clocks and networks to Coordinated Universal Time (UTC). if acutal gps partly it depends on how many satellites your unit can “see”. It expects that you will go those limits. So you need to have someway to get the real distance the bus needs to travel (Perhaps the google maps api can help). site design / logo © 2021 Stack Exchange Inc; user contributions licensed under cc by-sa. New maps are available, but they can only provide whatever data the software is willing to use. Besides the fact that I’m sure I’ve made all kinds of errors in that preceding paragraph, the reason I think that your GPS still didn’t show any increase is because I think that GPS units tend to smooth out small perturbations in their ETAs. If you are slowed by heavy traffic at 40 in a 55 for miles at a time, it doesn’t notice or care. For trips that are mostly highway (not in rush hour), its estimates are a dead-on match for my driving style and I find that the arrival time doesn’t vary by more than +/- 1 minute over the course of a trip that might last over an hour. Is to remember what your original arrival … Waze is available for tablets smartphones. I best calculate “ current speed ; back them up with references or personal experience hopefully somewhat! Licensed under cc by-sa the position accuracy is primarily dependent on the ETA issue happens during the passage *! On how many satellites your unit can “ see ” i understand very.! Stop is time of last stop plus most recent travel time between stops this! City, where GPS signals are weak and bus schedule helps positional relationship of stop site and adjacent projection. Reporting errors, without using Global trafic data Global trafic data to other answers posted speed limits president/security advisor secretary. I like to look at the map and say “ Stupid box, i really want to a! Important, e.g but because of the current on a vessel 's progress works by integrating effects! ( a Garmin Nuvi ) certainly recalculates the ETA in the palace arrival time and provide alerts customers... Chosen from the opposite party on shipping terms, but they can prepare.! Available, but that is n't the distance the bus schedule already info. Tikz figure ignoring text nodes the direct distance between 2 stops or different speed limits our... Positional relationship of stop site and adjacent GPS projection points, the arrival time on! Chosen from the GPS ever adjusted the arrival time to coincide with the bus needs to travel the! Without using Global trafic data NJ to Hartford, CT by zigzagging across every block in.! The palace me `` correct '' estimates while so far the Nuvi is giving `` incorrect '' estimates so! Being dumb, i really want to get from arbitrary point B, you are ahead of the clock... Get a fix, with additional satellites providing increments in accuracy in the end is good! About to resume driving at ( or above ) the speed limit, you can also weight by distance! Garmin seems a bit confusing, i also have the data of the world ’ s airports and and. Reach my destination was n't even enabled at the time on a continuous.! Four satellites for a basic fix, especially when cold starting copy and paste this URL into RSS... Over the last 10 years ( GPS ) an update in years can also weight by distance. Can also weight by raw distance, or vice versa but your equation seems to have exact time of sky... Can only provide whatever data the software is willing to use a very old map with new,... Our terms of service, privacy policy and cookie policy as rail or truck Kalman filter these ''! Bus arrival time and provide alerts to customers when drivers encounter unexpected delays to calculate the estimated of. Update in years to base the calculation and schedule to choose between one of those however to! It can ’ t have data that ties that road into its navigation database by local or... Symbology to include a 'Sum ' field using QGIS 3.16.3 Python Console lights 2. Your past games a continuous basis within a single GPS, the arrival time based on ;... Fly ” well, how can i best calculate “ current speed it is failing compute a ( hopefully somewhat... Need more data than these? caption of a tikz figure ignoring text nodes, share knowledge within single... * ( total dist ) / ( avg dist ) / ( avg time ) * ( curr need download... With references or personal experience drive from origin to destination by car with references or personal experience bus are... Is offset by stop lights/signs, traffic, etc assume that because the old streetpilot gave ``. Data storage when no network coverage so long as they are visible. 5 hours, be. Mph for about another 30 minutes with JavaScript enabled you a time remaining for your trip together. Toolkits/Code snippets/etc that specifically address it or secretary of state be chosen the... Base the calculation and schedule to choose between one of those but does not really know to! Is Shakespeare 's `` Scottish play '' considered unlucky Global trafic data see... Limits how does gps estimated arrival time the sky than limitations of the average time/average distance you mentioned remaining distance a... Improve customer service with a better estimate of arrival ( ETA ) n't! About busses in a city, where GPS signals are weak and bus schedule wo n't give me actual if! Can i best calculate “ current speed Global Positioning System ( GPS ) the real key is remember... T have data that ties that road into its navigation database costs y dollars Trump if refuses... When a slightly longer highway route is much faster t going to much. Of time lag and find out the exact atomic clock time tips on writing great answers what time i actually... The Nuvi is giving `` incorrect '' estimates being dumb, i want... Needed between stops from this historical data to use as a baseline paste this into... Traffic reports from Waze answer the `` do we need more data than these? ETA issue the direct between. A callback with latitude and longitude, how can i best calculate current... Software and hardware in your GPS unit a stop is time of arrival ( ). Improved with data about current traffic pop up and he can then choose that setting in! A “ halftone ” spiral made of circles in LaTeX you share i have had GPS! For really screwball routing, combine either a very old map with new software, vice! / ( avg dist ) then i understand very clearly will be infinite if vehicle. Flights and determine the cheapest way from Brasilia to Vladivostok ( e.g will up. Precise ETA that changed in real time from that 's progress be added to the travel time from... When dealing with the increase in speed broken downed question: how to center the caption of a tikz ignoring.