An overview of Delaware's bicycle laws, reviewed and cited to primary sources. Use the sections below to jump to a specific rule, or the Sources block at the end for the full citation list.
This guide is for general information only and is not legal advice. Laws change — verify current rules with your state DOT or a licensed attorney before relying on this for any legal matter. Read full disclaimer.
Helmet rules
Required under age
Required under age 18
Applies to passengers
Yes
Standard
CPSC (16 C.F.R. Part 1203).
Penalty
Civil violation; fine of up to $25 for a first offense. The court must waive the fine on proof that the rider has obtained a CPSC-certified helmet within 30 days.
21 Del. Code § 4198 lets bicyclists ride on sidewalks unless prohibited by local ordinance or official sign. A rider on a sidewalk has the rights and duties of a pedestrian, must yield to pedestrians, and must give an audible signal before overtaking. Wilmington, Newark and the Rehoboth Beach boardwalk prohibit sidewalk cycling in designated commercial zones.
Delaware's DUI statute (21 Del. Code § 4177) applies only to operators of a 'motor vehicle, off-highway vehicle or moped,' and 21 Del. Code § 101 defines motor vehicle to exclude bicycles. Impaired cyclists may still face reckless-driving or public-intoxication charges, but the DUI penalties — including a 12- to 24-month licence revocation and ignition interlock — do not attach to bicycle operation.
White lamp on the front, visible from a distance of at least 500 feet.
Rear requirement
Rear reflector or light
Rear spec
Red reflector on the rear visible from a distance of 600 feet when directly in front of lawful upper-beam headlamps. A red rear lamp visible from 500 feet may be used in addition to (but not in lieu of) the reflector.
Bicycles are prohibited on Delaware Interstates (I-95, I-295, I-495) and on most limited-access state highways (including SR 1 from the Roth Bridge south to Dover) under DelDOT policy. Conventional state routes — including the iconic shoulder of US 13 — are open by default.