Hide your bicycle in the car and drive a mile away, park it, and complete your journey via bicycle. Keep the gas money until they have paid off the $100.00 they owe you from last year. Then have the bicycle commute talk with them. Perhaps take them in the car along your route to prove to them that the streets you will use are not full of fast cars and trucks. After that just use your bicycle.

If they refuse to let you bicycle to work then always get the gas money up front. Collect it daily in cash. Just say that because fuel prices are going up so regularly that you want to collect the money daily. Right now that might be about $8.00 per day depending on the vehicle. That way they will eventually be so annoyed with you asking for it that they might just give in and let you ride the bicycle.

Get the money the night before each ride to work. If they don't have the money then you can tell them that you will use the bicycle. You need to do this on bad weather days too. If you ask to use the car on those days then they will be able to say that since you are asking to use it then you shouldn't get gas money for work.

Good luck.