5.2 Key Components of Sight Distance

5.2 Key Components of Sight Distance Formally, sight distance is the length of road a vehicle travels before the driver completes a maneuver in response to an element, hazard, or condition that requires a change in the vehicles speed and/or path. Sight distance...

6.12 Signs on Horizontal Curves

6.12 Signs on Horizontal Curves Use curve warning signs to communicate downstream changes in horizontal alignment to motorists. Signs need to include a directional arrow that indicates if a curve bends to the left or right. Advisory speed signs can also be used. Table...

6.10 Countermeasures to Improve Pavement Delineation

6.10 Countermeasures to Improve Pavement Delineation Good pavement surface markings allow drivers to (a) detect and recognize curves earlier, (b) reduce speeds appropriately, and (c) adjust their lateral position. Table 6.3 provides design guidance for markings. Table...

6.6 Speed Selection on Horizontal Curves

6.6 Speed Selection on Horizontal Curves When establishing design speeds, account for functional/context classification, the legal speed limit, terrain type, anticipated vehicle volumes, level of surrounding development, expense, and design consistency. Procedure...