[junga]

>The safest infrastructure are ones that split pedestrian / bicyclist / motor traffic as much as possible, for obvious reasons.

Can you provide a source for this? (especially concerning the separation of bicyclists and motor traffic)

[maxsilver]

> Can you provide a source for this? (especially concerning the separation of bicyclists and motor traffic)

https://rspcb.safety.fhwa.dot.gov/Dashboard/Default.aspx

USDOT routinely finds freeways to be the safest roadway for all involved each year (lowest number of ped/bike/car fatalities), since it separates traffic modes.

Pedestrians and bicyclists go over/under/beside it on dedicated infrastructure, they are never on it. And similarly, cars are never on the dedicated ped/bike infrastructure, so collisions are effectively impossible from either side, due to physics.

[cglace]

If you completely separate two things they can not collide.

[admiral_biatch]

True, but it's not feasible to separate the traffic completely. Every intersection would have to be collision-free for cars, bikes and pedestrians. How much money and space would that require?

[anonymou2]

There will still be bike-bike collisions, also exclusive roads for bicycles are usually of low quality not up to engineering standards for roads, they will be full of dirt, unmaintained, with potholes. Most bicycle accidents are not even collisions with cars. The truth is, it is more convenient for motorists to remove cyclists from the road so they have them all exclusively for them, that is just not fair nor safer.

[loeg]

> There will still be bike-bike collisions

These are both more rare than car-bicycle collisions and less likely to be injurious.

> also exclusive roads for bicycles are usually of low quality not up to engineering standards for roads, they will be full of dirt, unmaintained, with potholes

Citation needed? The main problem I've experienced on bike paths is tree roots. Roads for bikes don't wear out particularly quickly, because bikes don't make anything like the kind of wear and tear on roads that cars or especially larger vehicles (buses and trucks) do. Road wear is proportional to weight squared.

> Most bicycle accidents are not even collisions with cars

What are they collisions with? Do you think bike-bike, bike-ped, and bike-fixed object collisions combined are more frequent than bike-car collisions? I don't have numbers on this one way or another. To provide some color, motor vehicle-fixed object collisions are about a third of all motor vehicle crashes[0].

Additionally, 95% of cyclist collision deaths are definitely car-bike collisions[1]. So even if they are not the majority of collisions, they must be disproportionately deadly and worth consideration anyway.

[0]: https://crashstats.nhtsa.dot.gov/Api/Public/ViewPublication/... p. 18 (table 5(b)).

[1]: https://crashstats.nhtsa.dot.gov/Api/Public/ViewPublication/... p. 5-6.