1. Cars burn gas all the time. Decelerating, idling, and accelerating all waste fuel.

2. Cars take longer to accelerate to average speed in city traffic than a bike does to get up to its average speed.

3. Cars are the enormous majority of traffic.

2 and 3 put together means that cars stopping at every intersection would kill the flow of traffic. That's why traffic signals are used instead of stop signs.

4. Cyclists have far greater visibility, meaning they can more easily see their surroundings. This makes the "stop and look" penalty lower and quicker than for a car or truck.

5. Vehicles are much easier to see than cyclists. This means that cyclists can see cars more easily than cars can see cyclists. This means that the burden of spotting the other kind of traffic should be on the traffic more difficult to be seen. IOW, cyclists should pretend they are invisible to cars (which they often are). This might seem callous to the poor, unprotected cyclists, but by disabusing them of the notion that they are special and protected, it would actually increase their safety.

6. You simply need to face reality. In the west, cars are the vast majority. Your mindset is irrational. By trying to force cars to respect cyclists, you're actually harming cyclists' safety. Cars are big heavy machines, and cyclists are unprotected bags of flesh. Mixing them together is foolish and asking for trouble.

It's not a software problem, it's a hardware problem. Instead of trying to write a driver that accepts bologna in a floppy drive without tearing it up, stop putting lunch meat in the grinder.