National Transportation Communications for ITS Protocol - Object Definitions for Ramp Meter Control (RMC) Units v01.17; A Joint Standard of AASHTO, ITE, and NEMA
The messaging between central control entities and Ramp Meter Control (RMC) units is accomplished
using the NTCIP Application Layer services to convey requests to access or modify values of RMC unit
object definitions resident in the devices via an NTCI