Delaware Code Title 21. Motor Vehicles § 4119. Further limitations on driving to left of center of roadway

(1) When approaching or upon a curve or the crest of a grade in the highway where the driver's view is obstructed within such distance as to create a hazard in the event another vehicle might approach from the opposite direction;

(2) When approaching within 100 feet of or traversing any intersection or railroad grade crossing, unless otherwise indicated by official traffic-control devices;

(3) When the view is obstructed upon approaching within 100 feet of any bridge, viaduct or tunnel.