Depending on the velomobile, it is possible to reach speeds up to 40 mph (64 kmh). And the world speed record is even higher. It is currently 83 mph (134 kmh) and most people expect the Arion 1 velomobile to be even faster when it is ready here in 2015. The only problem with velomobiles is the price. Most velomobiles cost $6,000 or more, which is far more than the price of a normal bicycle - but it is still much less than the price of a car (and unlike cars, a velomobiles doesn't require any fuel).
Infographic by: icebike