Don't obstruct critical peripheral vision. Don't interfere with hearing. Don't cause dangerous temperatures inside the helmet. Don't cause fatigue. Zwerling also suggests motorcyclists wear leather jackets and chaps or other thick outer wear to protect arms and legs.
Accidents are equally as frequent on both types of roads.
Remember to anticipate other drivers and stay out of their blind spots. Never ride with another motorcyclist side by side. Always stay single file. Zwerling also encourages motorcycle riders to take a motorcycle riding course offered by the Department of Motor Vehicle Safety. For more information on helmets and motorcycle safety, talk to your family physician.