I am hoping to build a bike soon. First I need to get familiar with a 4 mi a day ride I will be taking from a train station to my office. So I will start with a regular bike. Part of the ride mixes me with traffic going past a freeway entrance/exit ramp. Scary, but I will use my fear to my advantage. Soon, the ice on the roads may prevent me from riding, but I have plans to build up a few ice tires that will help me arrive without biffing along the way. I would like to start with a simple hub motor (24v), but there are so many to choose from in the online classifieds. Eventually, I plan on a trike with a few thou watt motor and 72 volts. I plan on reviewing my plans with the local P.D. However, I may be told my trike is a motorcycle. Hmm. I will be taking it all slowly.