# Generating "free" energy from vehicle traffic. I am skeptical. (Physics related.)

**URL:** <https://boards.straightdope.com/t/generating-free-energy-from-vehicle-traffic-i-am-skeptical-physics-related/932040>\
**Category:** Factual Questions\
**Created:** [February 2, 2021, 10:02am UTC](https://boards.straightdope.com/t/generating-free-energy-from-vehicle-traffic-i-am-skeptical-physics-related/932040 "2021-02-02T10:02:19Z")\
**Posts on this page:** 1\
**Page:** 2

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**Author:** ![msmith537](https://avatars.discourse-cdn.com/v4/letter/m/d9b06d/32.png) [@msmith537](https://boards.straightdope.com/u/msmith537)\
**Post date:** [February 17, 2021, 3:34am UTC](https://boards.straightdope.com/t/generating-free-energy-from-vehicle-traffic-i-am-skeptical-physics-related/932040/21 "2021-02-17T03:34:48Z")

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I guess it just captures energy that would otherwise be wasted in the busses wake. Unfortunately, it only captures what amounts to a fraction of the energy required to push a bus for a few seconds every few minutes.

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