Nuts and Bolts of Jolts

Federal Highway Administration Video VH-439 Nuts and Bolts of Jolts Addresses problem of damage to traffic control equipment due to electrical noise and transients (voltage spikes and surges) due to lightning, switching, and radiated electromagnetic interference (EMI) from radio and TV stations, radar, and mobile radio transmitters. Describes procedures, practices and specifications for the protection of traffic control equipment and other types of equipment operated by transportation agencies. Topics include lightning and transient protection device selection, placement, installation, grounding, bonding, shielding, and maintenance. Based on NCHRP Report 317.