Highway grade crossing warning systems use many types of protection to ensure reliable operation, safety, and long service life. These protections help prevent equipment damage, operational failures, and unsafe conditions.
Electrical protection is used to protect circuits and electronic equipment from electrical faults and power disturbances. Fuses and circuit breakers provide overcurrent protection, while surge protectors and voltage regulators protect against voltage spikes and lightning strikes.
Proper grounding is also extremely important because it provides a safe path for fault currents and helps protect both personnel and equipment.
Environmental protection helps warning systems survive harsh outdoor conditions. Equipment enclosures are weatherproofed to protect against rain, snow, heat, humidity, dust, and debris.
Components are also designed to resist vibration caused by trains and roadway traffic. Corrosion-resistant materials and protective coatings help prevent rust and deterioration.
Mechanical protection is used to protect gates and equipment from physical damage. Gate breakaway mechanisms allow the gate arm to detach during a vehicle impact, reducing damage to both the crossing equipment and the vehicle.
Additional protections may include tamper-resistant cabinets, collision barriers, battery backup systems, fail-safe design features, and monitoring systems that report faults or equipment problems to maintenance personnel.