[bobthepanda]

In several locations in the US electric bikes are speed-limited to 20-25mph (32-40 km/h). There's no reason you couldn't set the speed governor much lower to match human speeds.

At least where I live (Seattle) if I were to take up biking I'd need a electric assist, since the hills are absolutely massive and steep.

[ygra]

At least in Germany most electric bicycles are limited to about 25 km/h, which is about what normal cyclists manage on straight roads, anyway. It's definitely not unreasonably fast.

There's also the category of electric bicycles limited to 40 km/h, which are handled pretty much identical to motor scooters (require insurance, cannot use normal bike lanes, unless specified, etc.).