An
arbitrarily set 'maximum legal speed of travel' that is almost always disobeyed, except in horrible conditions. However, even then, you'll find some still ignoring it. Nonetheless, only the latter in dangerous, and speed limits serve little purpose aside from bringing in revenue. Used also as an excuse for
stupid drivers to be able to stay on the road as long as they 'obey the law'. Remember, speed doesn't kill people, people kill people. Aggressive drivers tend to speed a lot but not all
speeders are aggressive.
The autobahn in Germany has a lesser accident rate than almost every US highway and this includes many out of country drivers (Austria mostly) that are far more dangerous. Out in the midwest, people are usually more laid back, so they drive closer
to the limit (though usually slightly above still).
In the east and west, people are usually going
10-15 above (sometimes more in areas with even lower limits). This is great for city and state coffers because people who are only going 5-10 above the usual traffic speed (often to pass) are ticketed for 20, sometimes 25 over the limit. It's also a very easy way to profile certain groups because everyone is already speeding anyway. Realistic limits, or better yet,
no speed limits might cause a few idiots to run off the road, but most slow drivers AND fast drivers go the speed they do because they are not comfortable with any faster. Keep right unless you are passing or have nowhere else to drive.
So, next time you get pulled over, remember that you're just being
taxed further. Unless of course, you were
weaving through traffic like an asshole and really deserved it. However, most people ticketed are just average
Joes attempting to get from point A to point B. There's little evidence that speed limits actually increase 'safety'. The assholes who cut people off and fail to use
turn signals are the real danger, not speeders.
Also, 'enforcing' these limits is a waste of time, waste of our money, and a danger to police officers who sit on the
median and the drivers who panic when they see them.