On a 2-lane highway where passing is unsafe because of traffic in the opposite direction or other conditions, a slow-moving vehicle, behind which 5 or more vehicles are formed in line, shall turn off the roadway wherever sufficient area for a safe turnout exists, in order to permit the vehicles following to proceed. As used in this section, a slow-moving vehicle is one which is proceeding at a rate of speed less than the normal flow of traffic at the particular time and place.
Structure Delaware Code
Subchapter III. Driving on Right Side of Roadway; Overtaking and Passing, etc.
§ 4114. Driving on right side of roadway; exceptions.
§ 4115. Passing vehicles proceeding in opposite directions.
§ 4116. Overtaking a vehicle or bicycle on the left.
§ 4117. When overtaking on the right is permitted.
§ 4118. Limitations on overtaking on the left.
§ 4119. Further limitations on driving to left of center of roadway.
§ 4120. No-passing zones; exceptions.
§ 4121. One-way roadways and rotary traffic islands.
§ 4122. Driving on roadways laned for traffic.
§ 4123. Following too closely.