# Size of traffic signals

**URL:** <https://boards.straightdope.com/t/size-of-traffic-signals/263276>\
**Category:** Factual Questions\
**Created:** [September 5, 2004, 11:05pm UTC](https://boards.straightdope.com/t/size-of-traffic-signals/263276 "2004-09-05T23:05:37Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![rippingtons\_fan](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/rippingtons_fan/32/11767_2.png) [@rippingtons\_fan](https://boards.straightdope.com/u/rippingtons_fan)\
**Post date:** [September 5, 2004, 11:05pm UTC](https://boards.straightdope.com/t/size-of-traffic-signals/263276/1 "2004-09-05T23:05:37Z")

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How large are those traffic signals (the ones that hang above the road on those power lines) and how much do they weigh? (They look to be around 3 feet high.)  
Are they manufactured by just one company or do many companies make them?  
Do they use special light bulbs?

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**Author:** ![silenus](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/silenus/32/166_2.png) [@silenus](https://boards.straightdope.com/u/silenus)\
**Post date:** [September 5, 2004, 11:15pm UTC](https://boards.straightdope.com/t/size-of-traffic-signals/263276/2 "2004-09-05T23:15:54Z")

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They run 3 - 4 feet in length, and about 13 inches across. The weight varies depending on the number of lights in the enclosure. Typical weights for the polycarbonate signals are 14 - 29 lbs. The more modern lights use an array of LEDs. They are manufactured by at least 7 companies that I have found with just a cursory search. Hope that helps! 😃