Have multiple lanes, two or more lanes, going in the same direction, Have barriers sometimes a guardrail, concrete barrier or grassy median to divide opposing traffic, Have interchanges to control access at certain locations where a driver can enter and exit, cross traffic is not present because of interchanges, Prohibit pedestrians, bicyclists and slow-moving vehicles, Are designed to help drivers anticipate conditions ahead, Reduce collisions with fixed objects by design, Have a low frequency of collisions, but may have a high severity rate when a collision occurs because of higher speeds. Rumble strips installed at the road edge to alert drivers that they are drifting off the
roadway onto the shoulder or median, acting as countermeasures to driving off the roadway because of drowsiness or inattention, Redesign of median barriers, Breakaway sign support posts, New design guard rails with ends angled away from roadway and buried, Vinyl crash barrels filled with liquid or sand and placed at bridge heads and major
decision points, Reflective signs or delineators mounted near the edge of a roadway to indicate the
roadway alignment and aid in night or poor visibility driving, Mile markers located off the shoulder used as reference points along a route, Protected left and right turn bays, Collector/distributor lanes on high speed, high density highways to separate slower moving entering/exiting traffic from through traffic,Message signs to alert drivers to problems 11th EditionElizabeth A. Weaver, Frederik R. Mottola, Owen Crabb, Randall R. Thiel899 explanations
3rd EditionJohn P. Zaniewski, Michael S Mamlouk366 explanations
9th EditionWilliam Kleitz440 explanations
3rd EditionAlan B. Marcovitz414 explanations
