I had to drive to work last week, something that I don't usually do. It requires a lot of concentration to avoid being hit by rude and inconsiderate idiots. This is rant, feel free to skip this post.

Tailgating

What's up with driving 1m behind the person in front of you? Even at 60km/h,  10m is not enough for you to react in time if somebody in front has to slam on their brakes unless you have Jedi like reaction times. In one second you would have traveled 16m. So by the time you react, press the brake, and hydraulics transfer and the car starts to decelerate, you would have slammed into the back of the car in front already. People do this at 100km/h and above, that's like 30m/sec. Maybe we should do speed in m/sec so people are more aware of just how fast they are going in terms of physics.

The worse is rush hour, where the highways are already packed. So they tailgate and flash their headlights at you even though the road is packed ahead as far as the eye can see.
Only a few people deserve the right to have the road cleared ahead of you, ambulances, fire engines and police. Of course, since I keep some space in front of me they think I'm going slowly, they do the next thing....

Weaving and overtaking from slow lane or lanes where you need to give way

To overtake cars from the slow lane is dangerous, because the cars are slower, therefore the window to overtake is even less as you need to do it before slamming in the car in front of you. Almost always  these people end up forcing their way in front of you as they swerve back into the fast lane. Of course they are probably thinking how awesome they are, when actually you have to hit the brakes to avoid them taking out the left front of your car. And right there behind you is another idiot tailgating you. I usually have to anticipate this and slow down earlier so that the next guy behind me also doesn't slam into the back. Usually though, I just take the middle lane, it's a bit slower but people there seem to be safer and keeping their distance.

Give way lanes are even worse. I don't know why, but people seem to think that when merging and your lane is ending, that when the space is running out, it means time is running out and you have to overtake from the inside and squeeze yourself in somehow.

Sticking car out and overtaking while trying to join main road

On slow packed roads, it's understandable to slowly edge in. Otherwise you would never join the main road. Not so when traffic is relatively fast. Edging your car out a few meters into the main road is bloody dangerous. Of course, when somebody is being safe, the dude behind comes right up beside you and blocks the other lane and your view.

This problem is compounded by the fact that cars never use their indicator light, probably leading to the above scenarios. Maybe drivers are too uncoordinated to use flick a lever. Even driving manual shift, it's something you can do without thinking. So I consider people who don't use indicator lights as just plain inconsiderate.

Be most excellent to each other

Of course it all boils down to being rude and inconsiderate to others. Since coming back 7 years ago, I have to say that driving situation has improved a lot. They should keep the shocking ads on TV going. Driving a car is one of the most riskiest things you will do on a daily basis. Inconsiderate drivers probably are not aware that they are not just being rude, but that they are potential murderers every time they are behind a wheel.