Large and fast bikes are already a problem without electric assist. A typical triathlon bike can easily do 35km/h, and the wider Milan Velomobile can do over 5

Large and fast bikes are already a problem without electric assist. A typical triathlon bike can easily do 35km/h, and the wider Milan Velomobile can do over 50km/h. In the US and Canada, it's illegal to use electric assist to reach over 32km/h and most European countries have more stringent limits. But human powered bikes are faster anyway. If a group of cyclists use drafting, they can push the speed up that way. This also only includes mass produced bikes. The world record for human power is much much faster again--last year Aerovelo Eta broke the world record, reaching 144 km/h on the flat with no assist. Most bike lanes aren't designed for this.