That's the maximum permitted speed on that section of road.
A posted speed limit sign indicates the maximum speed permitted on the roadway for daytime or nighttime. In the case of the example in the question, the permitted speed at all times would be 55 miles per hour.
Maximum Permitted Mileage
there is a slight difference. Maximal is an adjective meaning the highest or greatest possible. Maximum can be an adjective meaning as great, high or intense as possible or permitted or a noun or adverb. So in certain contexts they may not be the same - the vehicle's maximal speed may not match the maximum speed allowed on the motorway.
maximum permitted length of bat is 38" inches.
maximum permitted length of bat is 38" inches.
16 lbs
The maximum speed of MCA is 10 MHz
FMVSS 108 says the maximum candlepower of headlamps is 200,000
15
100
The maximum velocity produced by a car is the same as its maximum speed. This maximum speed is typically limited by the car's engine power, gearing, and aerodynamics. It is the fastest speed the car can achieve under optimal conditions.