All persons under the age of 18 must wear an approved, properly-fitted and fastened bicycle helmet while :
operating a bicycle.
riding upon a bicycle.
riding as a passenger on a bicycle.
riding in a trailer towed by a bicycle.
riding upon a bicycle while in an attached restraining seat.
As of March 1999, all bicycle helmets made in or imported to the United States must meet a uniform safety standard issued by the U.S. Consumer Product Safety Commission (CPSC). Among other things, this means that bike helmets for children ages 1 to 5 will cover more of their heads, giving them more protection. After March 1999, look for a label or sticker that says the helmet meets the new CPSC standard.
The law applies at all times while a bicycle is being operated on any property open to the public or used by the public for pedestrian and vehicular purposes.
Parents or Guardians shall be fined if a child is found to not be wearing a bicycle helmet.
The fine for the first violation is $25, and $50 for subsequent violations.
The court may dismiss all charges upon the presentation of evidence that an approved helmet has been purchased or obtained for use.
Bicycle Laws
Bicyclists must obey all traffic laws.
Motorists must treat bikes like all other vehicles.
Bicyclists have all the rights, duties, and responsibilities of a motorist.
Bicyclists must use hand signals to signal to vehicles.
No bicycle shall carry more riders than it is designed for.
All riders under the age of 18 must wear a properly fitted and fastened bicycle helmet while riding on public properties used for vehicles or pedestrians.
Bicyclists must not cling to any vehicle upon the highway.
Ride with the flow of traffic, not against it.
Ride as far to the right of the roadway as possible.
Keep at least one hand on the handlebars at all times.
For night riding, use a white headlight visible for 500', a red rear reflector visible for 600', and reflective material visible from both sides visible from 600' or side light visible for 500'.
Yield to pedestrians on the sidewalk and in crosswalks and give an audible signal before passing.
It is illegal to wear a headset covering both ears while bicycling.
Alcohol and drugs impair bicycling ability as they do driving ability.
Delaware's Bicycle Helmet Law States: 