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you can find a map on this site https://ops.fhwa.dot.gov/freewaymgmt/ramp_metering/index.htm https://ops.fhwa.dot.gov/freewaymgmt/ramp_metering/index.htm which
by Shivetya 9y ago
you can find a map on this site https://ops.fhwa.dot.gov/freewaymgmt/ramp_metering/index.htm https://ops.fhwa.dot.gov/freewaymgmt/ramp_metering/index.htm which shows where it has been implemented; Atlanta area where I am has an extensive amount of this and HOV systems, and express(toll) lanes.