# 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.

- Kind: Educational
- Year: 1993
- By: Federal Highway Administration
- Genres: Education
- Archive: [Internet Archive](https://archive.org/details/gov.fhwa.ttp.vh-439)
- Licence or status: [CC0 1.0](http://creativecommons.org/publicdomain/zero/1.0/) (as the archive states it)
- Who can watch: Tweens profiles and older (the archive gives no rating; placed by Invisible Network from its collection and subjects)

Not offered: its uploader or archive marks it public domain, and nothing the site holds bears that out (its record gives no year, or a year from 1978 on, which no US term has left), so where it is free is not known. Unclear is not offered.