[loeg]

> Being hit how? What type of accidents are more likely to happen?

95% of bicycle deaths are a result of motor-vehicle bike collision, and the vast majority of collisions are between the front of the motor vehicle and a bicycle.[0]

> there will still be bike-bike collisions and other types of accidents

Sure, but these collisions are far less deadly and injurious. Exchanging car-bike collisions for bike-bike collisions is a good tradeoff from a public health perspective.

[0]: https://crashstats.nhtsa.dot.gov/Api/Public/ViewPublication/...

[anonymou2]

No, what is good for a public health perspective is to avoid collisions (and falls which is the #1 accident with bikes). It is quite easy to avoid car-bike collisions, in fact car drivers are far more predictable than ignorant cyclists. Of course in order to do that you have to know what the most frequent type of car-bike collisions are, guess what? they are not cars hitting a bicycle from behind, they happen in intersections due to crossing traffic and bike segregation only increases them by making intersections more complicated.

[loeg]

Your argument hinges upon the notion that separated grades increases incidence of car-bike collision per capita. I concede that if that that core fact is true, you're correct — separate grades would be worse from a public health standpoint.

So, do you have evidence for that central claim, or is it just speculation?