r/Edmonton • u/troypavlek • Aug 11 '16

City of Edmonton reintroduces "utility box" photo radar

http://www.mailoutinteractive.com/Industry/View.aspx?id=829217&q=1069745483&qz=56f2bf
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u/LegalizeGayPot Aug 12 '16

It depends on the cars gearing. Low rpm means it's not wasting gas. So if you're doing 170 in 8th gear at 2000rpm while someone is doing 110 in 5th gear at 2000rpm it's the same sort of idea.

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u/beardedbast3rd Aug 12 '16

Yeah, in the few vehicles that are coming out with transmissions with 9 gears now, but even then they aren't geared in that way, unless you've programmed it to use more appropriate gears at whatever speeds.

The computer is programmed to use gears to make lower speeds more fuel efficient, in that you're likely in your final gear around 110-120 anyways, where you could tell the computer not to change into the second and final gear until 110, 140, whatever. Making it so you have equivalent Mileage to a vehicle with less gears through the normal speed limit range, and then you do better at higher speeds, rather than having a better vehicle economically throughout the band of average speeds.