For purposes of the ITS device guidance process, Ramp Meters are defined by the Manual on Uniform Traffic Control Devices as traffic control signals that control the flow of traffic entering a freeway facility.
The planning guidelines for ramp meters are presented as one tool to assist agencies in selecting deployment locations, and are not a replacement for the planning or design process. Also, prior to deploying a ramp meter System, ensure the basic requirements of the MUTCD (2009 Edition Chapter 4I. Traffic Control Signals for Freeway Entrance Ramps) have been met at the location of concern.
Engineering judgment should be used to assess potential implications that may result from installation of ramp meter. This planning guidance does not mandate the use of ramp meters.
Three (3) guidelines have been identified to capture the most common purposes and used of Ramp Meters. While there are other purposes and uses for Ramp Meters, the guidelines developed to date have focused on the following three. If you have suggestion of additional Ramp Meter guidelines please contact us.