It may be a reasonable assumption; what are typical vehicle occupancy rates? Also, a bicycle-majority traffic mix wouldn't have to conflict with the presence o

It may be a reasonable assumption; what are typical vehicle occupancy rates? Also, a bicycle-majority traffic mix wouldn't have to conflict with the presence of high-passenger-capacity buses. That may be true that cars can have shorter time-distance separation, but I think there's a gap in the modeling there with regard to group travel: If you have a four-passenger car and compare that to the same group of people traveling together by bicycle, the time-distance separation factor disappears.