Are there ever speed cameras on highways

Why is there no public pressure to increase the speed limit on highways as most drivers drive faster every day?

In essence, you've done a rough survey of highway drivers and concluded that many would want the speed limits increased. This likes in people hold true who frequently use the motorway. It's less clear that people who don't use the freeway often are equally interested.

In 2015 there was some discussion in the UK about raising the speed limit for motorways to around 130 km / h. It was never enacted. There were several reasons for this: It was suggested that the speed should generally be increased by 16 km / h, with the same number of people only now accelerating at 150 km / h. This would increase gasoline consumption (at a time when the government was interested in reducing CO2 emissions). Either drivers would have to split up, road capacity would be reduced, or safety would be compromised. There would be an increase in the number of accidents or the severity of the accidents. The relative speed between cars and trucks (speed limited to 90 km / h) would be higher, which in turn is a potential source of collision. The noise from highways would increase and there was resistance from people living near the street. Ultimately, it did not seem worth the parliamentary time to properly examine these issues and draft the necessary legislation. (Then came the referendum to leave the EU and there was no parliamentary time for anything)

The same considerations apply in other countries as well: for every person who uses the motorway and wants to drive at 160 km / h, there are others who object to it for environmental or safety reasons. Your observation of drivers is not a representative sample of voters.

James K.

Because the "two-second rule" is a rough rule of thumb. The actual braking distances are the square of the speed, so the distance should also be square. In fact, drivers do not observe this, so higher speeds lead to greater risks.

jamesqf

Re "Drivers Had To Separate", as an observation, they don't (at least on western US highways). If anything, vehicle separation has decreased.

Sjoerd

@JamesK The braking distance is square, but so is the car in front of you. Assuming they are both traveling at the same speed and having the same brakes (you must assume something), the actual distance you need, "reaction time times speed when starting braking," is linear in speed and even constant, if measured in time. (Note that 2 seconds is much longer than the average reaction time, so that there is a large margin to compensate for the difference between braking and take-off speed.) Only when suddenly, for example, an immovable wall on the motorway appears in front of you, does the "square" appear " in the game.