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Driving with low carbon emission can only mean driving with a speed that is (much) smaller then the allowed maximum speed outside of cities. E.g. 80km/h (or eve

Driving with low carbon emission can only mean driving with a speed that is (much) smaller then the allowed maximum speed outside of cities. E.g. 80km/h (or even 70) instead of the allowed 100km/h in Germany. This way I can reduce my fuel consumption by at least 30%. With Google Maps driving and reaching the ETA is very stressful (and burns a lot of gas) as you often have to "max out" the speed limits. I guess the AI that is used is based on the average person that drives like this and/or does not care about the speed limits (which is the case here in Germany). And so I doubt that anything ecologically can come out of an AI that is based on the current state. To change something you would have to assist people how to reduce fuel consumption. This would have many advantages: it would reduce stress and accidents (people would be less willing to overtake a 'slower' car) and the time of arrival would be only 2-4 minutes later on a 1 hour trip.

cerved 6y ago
When you calculate the shortest path in a road network, you usually take the distance and divide it by the speed limit to determine the weight of the edges. To be fancy you also do things like account for deceleration and acceleration at nodes (turns). Artificially capping the speed limit is easy. You often do this for things like tractors that don't drive at the speed limit. If people want to drive under a certain speed it's a trivial technical problems for the individual vehicle and path finding. I'm not sure the calculations are made individually however, so an individual speed limit may be a non trivial problem
- carstenhag 6y ago
  As you mentioned tractors, it's pretty sad one can't define usual/max driving speeds on Google Maps. Applies to e-bikes, tractors, cars with trailers, etc
benhurmarcel 6y ago
This is a good point, and navigation apps like Google Maps could perfectly tell you something like "On this section driving at x km/h would save y€ of gas for only z minutes added".

cerved 6y ago

When you calculate the shortest path in a road network, you usually take the distance and divide it by the speed limit to determine the weight of the edges. To be fancy you also do things like account for deceleration and acceleration at nodes (turns). Artificially capping the speed limit is easy. You often do this for things like tractors that don't drive at the speed limit. If people want to drive under a certain speed it's a trivial technical problems for the individual vehicle and path finding. I'm not sure the calculations are made individually however, so an individual speed limit may be a non trivial problem

carstenhag 6y ago
As you mentioned tractors, it's pretty sad one can't define usual/max driving speeds on Google Maps. Applies to e-bikes, tractors, cars with trailers, etc

benhurmarcel 6y ago

This is a good point, and navigation apps like Google Maps could perfectly tell you something like "On this section driving at x km/h would save y€ of gas for only z minutes added".