# "Propane Powered Vehicles Not Allowed"....

**URL:** <https://boards.straightdope.com/t/propane-powered-vehicles-not-allowed/397529>\
**Category:** Factual Questions\
**Created:** [March 26, 2007, 12:15pm UTC](https://boards.straightdope.com/t/propane-powered-vehicles-not-allowed/397529 "2007-03-26T12:15:15Z")\
**Posts on this page:** 1\
**Page:** 2

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**Author:** ![danceswithcats](https://avatars.discourse-cdn.com/v4/letter/d/9e8a1a/32.png) [@danceswithcats](https://boards.straightdope.com/u/danceswithcats)\
**Post date:** [March 27, 2007, 8:44pm UTC](https://boards.straightdope.com/t/propane-powered-vehicles-not-allowed/397529/21 "2007-03-27T20:44:22Z")

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Which is why I refer to the HazMat rule of thumb. Extend your arm, hand in a fist, with thumb extended upward. Point hand towards incident. Can you see the incident around your thumb? If so, and you’re not wearing Level A and/or prox garment you’re too close.

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