| 340 / | HD | COMMUNICATIONS: ELECTRICAL |
| 907 | DF | TRAFFIC CONTROL INDICATOR {8} |
| 916 | DF | .~ Intersection normally under local controller {5} |
| 917 | ![]() | .~.~ Controller responsive to traffic detectors {4} |
| 918 | DF | .~.~.~> Controller, when changing right of way, alters or skips normal "go" cycle of street having no traffic detected |
| 919 | DF | .~.~.~> Plural cross highways at intersection each have traffic detectors {1} |
| 922 | DF | .~.~.~> Density determines split |
| 923 | DF | .~.~.~> Extension of time |