340 / | HD | COMMUNICATIONS: ELECTRICAL |
907 | DF | TRAFFIC CONTROL INDICATOR {8} |
916 | DF | .~ Intersection normally under local controller {5} |
917 | DF | .~.~ Controller responsive to traffic detectors {4} |
918 | .~.~.~ Controller, when changing right of way, alters or skips normal "go" cycle of street having no traffic detected |