R15-1 – RAILROAD CROSSING (CROSSBUCK)

 R15-2 – NUMBER OF TRACKS

 R15-3 – EXEMPT

R15-4a – RIGHT LANE LIGHT RAIL TRANSIT ONLY

R15-4b – LEFT LANE LIGHT RAIL TRANSIT ONLY

R15-4c – CENTER LANE LIGHT RAIL TRANSIT ONLY

R15-5 – DO NOT PASS LIGHT RAIL TRANSIT

R15-5a – DO NOT PASS STOPPED TRAIN

 R15-6 – NO VEHICLES ON TRACKS

R15-6a – DO NOT DRIVE ON TRACKS

 R15-7 – LIGHT RAIL TRANSIT DIVIDED HIGHWAY CROSSING

 R15-7a – LIGHT RAIL TRANSIT DIVIDED HIGHWAY CROSSING (T-INTERSECTION)

 R15-8 – LOOK