Based on the California driving code you are supposed to keep up with the flow of the traffic on the road around you so if the rest of the road is going 70mph i

Based on the California driving code you are supposed to keep up with the flow of the traffic on the road around you so if the rest of the road is going 70mph in theory you could get a ticket for doing 60mph. Generally unless you are the only car on the road or you are weaving dangerously between cars at high speed its unlikely you will get a speeding ticket if you are part of a pack of cars for this reason. Then again I'm not a lawyer so don't go off my knowledge ;)