h2g2 The Hitchhiker's Guide to the Galaxy: Earth Edition

Indicators are to show the manouevre you've just completed- e.g. after coming off the roundabout, indicate left. After all, you want to keep other motorists informed don't you?

The use of hazard lights permits one to park anywhere: in the middle of main street, in the fast lane on the motorway, etc. etc. No one will mind, you've got your hazards on haven't you?

When coming up to a roundabout, choose your lane with care. Then change your mind at the last moment. Other drivers really love this.

Refuse to merge at the same speed as everyone else. Be an individual!

When turning right (usually in front of me) don't go when there's plenty of space, wait until I'm a lot closer, then peel out suddenly right in front of me so I have to slam on the brakes. Then drive off at a speedy 20mph.

Wave at other drivers to show that you appreciate their not getting out of their cars to strangle you when you do any of the above.

Insiders tip: you can enhance all of the above by drinking heavily beforehand.

Cheers!

Also,

You didn't mention the various forms of irish speed control on rural roads,

1. Tractors doing about 10mph max on a road that is wide enough for only ONE tractor.

2. Sheep (herds of)

3. Cows (herds of)

And for driving in Dublin, there is one rule and one rule only...the other person is more attached to their car than you are to yours, so they will brake/get out of way/swerve into crowd of students to avoid hurting their car too much...

Dublin bus drivers KNOW that they are in a bus (and will thus be the winner in any accident) and will not even bother to use mirrors when pulling out from a stop or merging...this is actually GREAT when you don't drive (like me!!) because traffic doesn't matter as much.

Speed control in the capital takes the form of crowds of jaywalkers. If you show ANY weakness at all in approaching a set of traffic lights where there is a crowd waiting (weakness being slowing down just in case or leaving a gap of more than 10cm between you and the car in front) it will be full of people in the time it takes you to blink, and the normal etiquitte (spl?) here is to slam on brakes and slam hand on to the horn. Screaming swearwords from and open window is also acceptable.

Pedestrians on Dublin streets are veterans at jaywalking, so if you approach a crowd at about 70mph, they will clear and respect you for being a strong person (unless they are a tourist, in which case they probably just ruined the front of your car)...

Ahhhh...I miss Dublin sometimes...people don't jaywalk as much in Germany and so the cars get scared when you do it and slow down...gives you a real sense of POWER!! In Dublin, they speed up and aim...tis a "cat and mouse" game...or rather a "large metal object and something soft and killable" game.

slan

Jaywalking in Ireland especial in big towns (Can I say "big"? Can't remember any "big" towns there. Let's say: in towns) is a very good exercise! After that it's a lot easier to get over a full street in Germany.
Just be hard!
Show no sign of weakness!
And be sure you can run fast enough!!!