[Gustomaximus]

> self driving cars will make traffic worse, not better.

I definitely see your logic towards higher density with things like 'office cars' so people do more travel. Or sleeping cars but that would be outside typical peak hours. But would self driving increase volume that much? Possibly if people stopped getting trains/busses but this should be remain cheaper and faster via priority lanes most cities have.

Also in general;

Freeways; most traffic jams are caused from someone breaking and then the next person breaks a bit more and so on creating a jam. With self driving car the computers will be able to talk and do a 'everyone accelerate on this mark' and get the flow happening even on very crowded roads. And ideally accident reduction that often creates traffic jams.

Cities: Algorithms will start making little efficiency improvement to driving. All the little things like removing unnecessary lane changing. People double parking to drop something off. And like those futuristic car intersection scenes where cars dont stop at lights but all go through an intersection from every direction reducing traffic back-ups.

We will need to make rules to adapt and keep the flow, e.g. stop people have cars driving around the block rather than parking. Ensure we have 'road neutrality' so the wealthy dont pay a premium for faster trips where other cars in the fleet move aside and slow everyone else type deal.

Anyway, I dont profess to know the answer. Its all a guess! I do suspect the benefits will outweigh additional trips people might take. Besides, who knows, maybe by then we'll have the 'Boring company' or equivalent making private roads so only the plebs use public roads anyway....

[doikor]

> With self driving car the computers will be able to talk and do a 'everyone accelerate on this mark'

This won't even be necessary as the self driving cars will have vastly superior reaction time when compared to humans. Especially if the cars are electric and thus have almost instant power to the wheels.

Especially if you use tricks like radar underneath the car in front of you so you can react to what the car one car ahead of you does etc.

Also a lot of the highway traffic jams are caused by too small distance between the cars. A self driving car should be much more efficient in keeping enough distance between the cars to keep up the flow.

[nkoren]

> But would self driving increase volume that much?

Absolutely. Not even accounting for induced demand, you'll see ~30% more vehicle-miles due to empty-vehicle repositioning.

As you say, accelerations and decelerations can be synchronised, accidents reduced, and standing wave behaviours eliminated, all of which will indeed help traffic flow more efficiently. But this is not by any means enough to compensate for empty-vehicle redistribution, much less induced demand.

> And like those futuristic car intersection scenes where cars dont stop at lights but all go through an intersection from every direction reducing traffic back-ups.

That's only possible in environments where there are no pedestrians or cyclists -- eg., segregated motorways/freeways, which already have no intersection conflicts. At best it represents a space saving, not really a time saving.