Which of the following best describes access management?

• A. The regulation of signals along a corridor to improve progression.
• B. The design of medians and turning radii to influence vehicle paths.
• C. The design of ramp metering on freeways.
• D. The control of points where vehicles can enter or exit a road to maintain traffic flow and safety.

Answer: (D)

Access management focuses on controlling where vehicles can enter or exit a road to preserve traffic flow and safety. By regulating the number and location of access points, spacing driveways, and restricting certain turning movements, a road can maintain smoother, safer operation and better overall capacity. This description precisely captures the function of access management. While related topics like signal timing, roadway geometry, or ramp metering influence traffic in other ways, they do not define the specific regulatory role of controlling entry and exit points to a road as clearly.