B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
B61L29/00—Safety means for rail/road crossing traffic
B61L29/24—Means for warning road traffic that a gate is closed or closing, or that rail traffic is approaching, e.g. for visible or audible warning
B61L29/28—Means for warning road traffic that a gate is closed or closing, or that rail traffic is approaching, e.g. for visible or audible warning electrically operated
B61L29/286—Means for warning road traffic that a gate is closed or closing, or that rail traffic is approaching, e.g. for visible or audible warning electrically operated using conductor circuits controlled by the vehicle
Landscapes
Engineering & Computer Science
(AREA)
Mechanical Engineering
(AREA)
Train Traffic Observation, Control, And Security
(AREA)
Automatic Block Signals and Signal Circuits: American Practice in the Installation and Maintenance of Signals Electrically Controlled, and Operated by Electric Or Other Power, with Descriptions of the Accessories Now Regarded as Standard