Beware of doors. Leave 3 feet.
You are allowed full use of the road, so ride at least 3 feet from parked cars, even in traffic. Do not assume that parked cars are empty, and do not assume that the driver will look before opening the door.
Follow the rules of the road. Yield to pedestrians.
Bikes are considered vehicles and are expected to follow all rules of the road. Ride in the direction of traffic. Stay off sidewalks in business districts. Stop for all red lights and stop signs. When there are traffic signals, wait for the green light. The walk signal indicates that it is safe for pedestrians to cross the intersection. This signal is not for cyclists. Wait for the green light before proceeding through the intersection. Failure to follow the rules of the road creates dangerous situations for both you and others.
Avoid blind spots.
Trucks, buses, and over-sized vehicles have large blind spots, particularly on the right. Avoid overtaking large vehicles. Stay visible to the drivers - if you can’t see the driver in the mirror, the driver can’t see you. The majority of cyclist fatalities in Boston have included large vehicles.
The “right hook” can be extra dangerous. Cyclists can get seriously injured by large vehicles turning and not seeing cyclists. Take extra caution at intersections and avoid being to the right of large vehicles.
Wear a helmet and use lights.
Wear your helmet. Use lights, reflectors, and bright clothing to see and be seen. Lights are required by law in the time between 1/2 hour after sunset and 1/2 hour before sunrise. You must have at least one white light on the front, and one red light on the rear of your bike. You must have reflectors on your your pedals or on your ankles. You may use as many lights and reflectors as you wish.
Helmets are required for anyone 16 or younger. Everyone should wear a properly fitting helmet anytime they ride a bike.