Speed limits: The standard speed limits are 50 km/h within the city limits and 100 km/h on rural roads, unless otherwise posted. The city limits are marked with a yellow sign which has the city name on it at the beginning of the city limits, and the same yellow sign with a red slash through it at the end of the city limits. When driving in the city, if you see a blue sign with white car, children and bike symbols on it, then you must drive at a walking speed.
Speed control: Beware the cameras that will gladly take your picture if you are speeding – these cameras are in many areas along the Autobahn as well as in the cities.
Lane markings: Lanes going the same direction are separated by dashed white lines. A Solid white line separates the different directions. Yellow lines are to notate a change in the traffic flow in a construction area – not to separate the different sides of the road.
Diving lanes: Stay in right lane whenever possible. After passing, go back to the right lane. The left lane should only be used for passing, especially on the Autobahn. If, while in the left lane, you see someone coming up behind you – get out of the way.
Passing: When passing, pass only on the left, and at a faster speed than the car you are passing. Don’t pass at the same speed – speed up, pass, and then return to the speed you were going. A double white line in the middle means no passing. A solid white line beside a dashed line means passing on the dashed side only.
Traffic lights: The colors on the signals represent the same things in Germany as they do just about everywhere else:
Green: Proceed with caution
Yellow: Prepare to stop
In Germany, prior to the light turning green, the yellow signal will come on with the red for a second. This indicates that the green signal is about to be actived, giving drivers a "get ready" warning.
Right on Red: You are not allowed to turn right on a red light. The only exception to this is when there is a specific signal with a green right arrow.
Traffic signs: These are usually posted on the right, so keep an eye out. The ADAC (the German national motor club) has made a very comprehensive list of traffic signs.
Right of way: When no traffic signal is at an intersection, follow these right of way rules:
If you have a sign with a yellow diamond at an intersection, you have the right of way. If you have a sign which is a white triangle with a red border (yield sign), you must wait for the oncoming traffic to clear.
If there is no sign, then a vehicle entering from the right has the right of way.
There are no 3-way or 4-way stop signs. Likewise, there are also no flashing red lights. If you approach a flashing yellow light, proceed with caution – this does not automatically give you the right of way.
Merging: When merging, observe the “zipper rule” (Reißverschluß), which states that both lanes feed into the continuing lane, alternating cars from each lane. No one lane has priority over the other.
Pedestrian Crossings: Pedestrians crossing the street have the right of way, and you must stop for them. Also, when coming to a stop at an intersection, make sure you do not block the pedestrian crossing.
Traffic Jams: If you find yourself driving into a traffic jam, remember to turn on your hazard lights to warn the drivers behind you. (You can turn them off again once you have a few cars behind you.)
Stalled car: If something happens to your car that is not a serious accident, move it over as far as you can to the right, put your hazard and parking lights on, put your safety vest on and set the warning triangle 100 m (200 m on the highway) away from the car to warn oncoming traffic. Telephones are placed along the Autobahn in case assistance is needed.
Gas stations: Not all are open 24 hours, but they do all offer different types of fuel. Make sure you know whether your car uses diesel or benzin (unleaded gasoline).
Cell phone use: It is illegal to use a cell phone while driving.
Alcohol limit: 0.05%
Baby seats: The baby seat requirements in Germany are different than those in other countries, so it might be easier to rent a baby seat upon arrival instead of bringing one along.
Roadside Assistance Numbers:
Central Information ADAC (0180) 5 10 11 12
Road Assistance ADAC (01802) 22 22 22