I notice the trip meter is off by 0.5 miles over 30 miles. This has not happened before and I have measured the distance carefully in the past by the trip meter, by GPS and by Google maps. I did reset it correctly, the only difference is the extreme traffic. Today I encountered what I would characterize as heavy traffic on my commute. For one stretch, it took about 30 minutes to go 3 miles. You would have to stop & go every 20 feet or so. As an aside, crawling at 6 mph for 30 minutes does drain the battery and does not boost MPGs once you have to put energy back into the battery. Stop & go traffic where you can use the engine somewhat gives me better overall MPGs. This is just my observation, for anyone who may deem this worthy.
Interesting. Was it 0.5 higher or lower than the actual mileage? Anyone know how the trip meter works? Does it count the number of rotation of each tire (should be very accurate) or does it integrate some kind of speed sensor (more error prone)?
Yeah, it was over. I believe it counts revs but it has to integrate the static loading of the tires. Perhaps integration error due to the stop & go of the vehicle plus highly variable speeds. It is not unusual to be off slightly on the same route, just this time it was a bit more than normal. It is more likely all the lane changes that I don't normally have to do could have added a few tenths of miles. I have also been told I weave in my lane a little bit in very slow traffic. Traffic is pretty good for MPGs however.
my trip meter is off over time from my odometer. reported that here many many moons ago. rounding errors i assumed it to be partly responsible. as far as verifying distances with other programs, u should be off. an exact route calculation is done by the center of the road you are traveling on which is not possible in real life.
Over how many miles? I never touch my trip meter and so far it tracks the odometer exactly the same at 17K miles as when I started recording at 272 miles except the rolling back to zero at 10K miles, i.e. digits below 10K tracks so far so good. Some excerpt of the data: ODO Trip 272 271.3 312 311.9 353 352.6 ... 17528 7527.8 17547 7546.4 17566 7565.1
over about 60,561 miles or so, give or take. i dont remember how much the adjustment was but the odometer was not matching my spreadsheet on gas mileage and after verifying what i could, i had to assume that trip and odometers were not matching. i "think" the adjustment was around 20 miles or so. mind you, i did not notice it being off until last fall when we got tires changed.
