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Originally Posted by Cynthetiq
I'm a firm believer if they were truly about safety, income, and mileage they can set photocops on highway stretches and photo all the offenders of speed limits.
I understand they have right turn stop activated cameras now, I don't see why they don't use speed sensitive cameras.
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Speed cameras are just another form of automated revenue generation.
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Originally Posted by echo5delta
I know for a fact, and from experience, that my Jeep gets better fuel economy at speeds under 65. At 55, it's a significant improvement. If I were able, I would take my long Interstate trips at 55-60 mph just for that. It's worth it to me - I enjoy driving in my free time, and I plan plenty of extra time into road trips. There's no way I can drive more efficiently, though, because with the 65-70mph speed limits in this state, I'd be impeding traffic.
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Your jeep has the aerodynamic efficiency of a brick. As did most cars on the road when the 55 federal speed limit was enacted. Even a sleek car like the Lamborghini Countach had a drag coefficient of 0.42. Compare that to a Camry which has a drag coefficient of 0.28. Most cars on the road have a significantly improved aerodynamic efficiency. They don't have the drag that older cars needed to overcome.
Cars back then also did not have the transmission advantages we share today. The average automatic transmission back then was a three speed with no overdive. Nowadays, you have five- and six-speed transmissions with overdrive and locking torque converters.
Then there's the introduction of electronic fuel injection, variable camshafts, etc.
In short, the technological advances that have been engineered into today's cars means the reduction in fuel consumption is not enough to justify this mandatory enforcement.