I turned a resort bike with automatic 12 speed transmission into an electric bike with a kit for the front wheel. I never went anaerobic riding it so the health benefits were negligible but the beauty is great.

In this area even Olympic cyclists get killed by cars. Bike Helmets do not prevent traumatic brain injury but only mitigate the severity.
Nigel is right about bikes ignoring traffic laws. If its done for car avoidance I don't see anything wrong with it.