How Many Lanes Does a Dual Four-Lane Road Have?

[EleanorMarie]

Dual four-lane: A total of four lanes in both directions. For example, there are two lanes heading south and two lanes heading north in the opposite direction, making it a dual four-lane road. Four-lane divided: Four lanes in one direction for separate traffic. For instance, the leftmost lane is for small passenger vehicles only, the middle two lanes allow both passenger and freight vehicles, and the right lane permits trucks. 1. Dual four-lane highway: Designed speed of 60-80km/h, with a subgrade width of 24.5 meters. 2. Additional information: Generally, each lane on a highway is 3.75m wide, with a central divider of 2m, a left hard shoulder of 0.75 or 0.5m, and a right hard shoulder of 3.5m.