You don't want to get a speeding ticket in California. To avoid an unwelcome ticket for speeding follow this advice:
Most importantly you need to make sure your speed is suitable for the driving conditions. This is the ‘Basic Speed Law' in California. It is a matter of common sense to consider visibility and the environment you are driving through and adjust your speed accordingly. It is essential to bear in mind stopping distance and go at a speed that allows you to stop safely. The law reflects this in the speed regulations. You can on Californian highways or freeways the top speed you can drive at is 65 miles per hour unless there is a sign showing that you may go up to 70 mph. On two lane roads on freeways or large city streets where you have traffic flowing in both directions without a barrier the maximum speed is 55 mph. Similarly if you are towing any trailer you need to keep your speed under 55 mph. On other suburban and city roads as well as in residential areas, the speed limit is 25 mph. You need to look for speed limits on roads which are shown on black boxed signs by the roadside.
There are other rules to be aware of so that you don't get a speeding ticket. There are restrictions around schools, usually 25 mph, although some roads by schools will have signs showing a limit of 15 mph. Young children don't think and can jump out into the road unexpectedly so it is always advisable to drive slowly where there may be children. A limit of 15 mph also applies where there is a blind junction, driving in alleys or within 100 feet of a railway crossing that does not have a barrier. The speed limit drops to 10 mph where there are trams or buses. You could also be given a speeding ticket if you are driving too fast for the conditions so you need to consider if it is foggy, the road is rough, there is heavy rain, dust, a build-up of traffic, animals or pedestrians around. You speed needs to ensure you are safe so that you avoid accidents. This also means going at a reasonable speed though and not so slowly that you could cause a hazard by blocking the movement of vehicles or cause unnecessary delay.
California takes road safety seriously and you need to comply with the Rules of the Road which have been explained in this article. Remember that it is dangerous to go too fast for road conditions. Speed kills and it is illegal to speed. Your speed affects your stopping distance; at 20 mph you can stop in 40 feet (about 3 car lengths), at 30 mph this almost doubles to 75 feet (6 car lengths) and at 60 mph it will take 175 feet to stop. You are breaking the law when you speed and risking yours and others lives. It is never worth the risk.
Be wise - stay alive.