MUTCD 11th Edition (2023)
Section 4P.01 — Application of Freeway Entrance Ramp Control Signals
Manual on Uniform Traffic Control Devices, Section 4P.01. Standards, guidance, options and support statements, with figures and cross-references.
Section 4P.01 Application of Freeway Entrance Ramp Control Signals Support: 01 Ramp control signals are traffic control signals that control the flow of traffic entering the freeway facility. This is often referred to as “ramp metering.” 02 Freeway entrance ramp control signals are sometimes used if controlling traffic entering the freeway could reduce the total expected delay to traffic in the freeway corridor, including freeway ramps and local streets. Guidance: 03 The installation of ramp control signals should be preceded by an engineering study of the physical and traffic conditions on…
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