A sign indicating a maximum safe speed:

Question

You should never exceed the speed shown on a "Maximum Safe Speed" sign.

Accepted Answer

Should be followed and no vehicle should travel faster than the posted speed.

Answer

Is suggesting a driving speed, but vehicles may travel faster than the posted speed.

Answer

Is suggesting a speed limit to be followed only by vehicles weighing more than 26,000 pounds.

Answer

Is only applicable to automobiles.