There are quite a few 20 mph roads near me where the only incentive to slow down is to avoid being caught be a speed camera.
The roads are wide and straight for long stretches, and going at the 20 mph limit just means you become an obstruction for the rest of traffic, even buses and lorries.
The design of the road and posted speed limits are sending mixed messages.
I can’t really make sense of what you’re saying. If the road is straight and wide but also has a low speed limit, that’s not sending mixed signals. Rather, it’s suggesting that you should drive slow even though your instinct tells you that you could drive quickly, presumably because there are either obstacles creating blind points that could lead to pedestrian or bicycle involved accidents, small children playing nearby, or cars turning onto or from side roads that you might strike if you’re driving at the speed that your gut tells you is safe.
In other words, you shouldn’t trust your gut when deciding how fast is safe on a road because your gut is often mistaken about the finer points of road design.
Also, you wrote that a slow driver would be an obstruction to other vehicles including trucks. I think you were wording that as a bad thing, but in reality it’s a good thing. One reasonable driver can force a dozen bad drivers to slow down.
Yea around here we have 4 or more lane highways with 60mph speed limits. You could almost double that safely if people actually used the lanes properly when not passing. Instead we have to deal with a mix of assholes going all different speeds trying to get around the people going 60 in the left lane and god help you of there’s a cop around.
Speaking as a person who does the limit (65 locally) in the right lane, sometimes the second to right lane in case there’s a lot of entering/exiting traffic… 120mph? What? The fuck?
Humans aren’t designed to react to things at that speed. You need insane following distances to drive that speed safely. With all that extra following distance you don’t get much more throughput (vehicles per unit time). But what you do get is a ton more fatalities, because at that speed, when you meet stationary objects, all you can do is hope you had your affairs in order. No amount of crash safety tests help there.
I gotta say, that if you’re the person who’s so frustrated about people driving the speed limit on a highway, you’re the asshole. Like yeah, sure, they should be in the rightmost lane practicable. That’s annoying, but it slows you down by a few mph for a minute or two and that’s it.
If you want to move at 120+mph safely to your destination, take high speed rail. If you don’t have that in your region, start complaining.
120mph? What? The fuck?
Humans aren’t designed to react to things at that speed.
Germany has entered the chat
Honestly I was thinking more like 100mph. I can pretty easily do 90+ on the roads around me when the roads clear without issue. I don’t get pissed at people for doing the speed limit. I get pissed at people that don’t use lanes properly and tailgaters. If you aren’t passing you should be in the farthest right lane possible until you need to pass. It’s my belief that the people that jump on the highway and get 3 lanes over and just squat there not passing anyone that cause most traffic issues.
130 km/h (or 80 mph) seems to be the international consensus on what a maximum safe speed is on a well-maintained modern highway.
There’s a concept in road design that says the engineer must first determine the design speed, which is basically how fast they want traffic to be able to flow. This part of the process is generally not part of any public hearing or put to a vote by public officials - it is just decided on and then they move on to the next step.
There’s also a prevailing concept in road design that seems to indicate that high traffic speeds are a design issue, but low speeds are an enforcement issue. The road is designed to accommodate the highest amount of traffic anticipated in the future without really thinking about if that’s even a good fit for the area.
Once the road has been built to exacting standards (which means it is far too wide and flat,) the city steps in and slaps a speed limit on it, often at odds with the design speed.
When residents get worried about all the speeding cars, they petition the city for a traffic study to see if anything can be done. The engineers conducting the traffic study determine that the road is capable of handling higher speeds than the current limit, and so to cut down on speeding the recommendation is to increase the posted limit.
It’s amazing to me how much influence the engineering team has on the design with basically no accountability. You can try to reduce speeding by putting up speed traps and police patrols, but at the end of the day people will drive as fast as they are comfortable with and that is often a result of the design of the road they are driving on.
