From this sign onward, what is the maximum speed you are allowed to drive your passenger car on this conventional road?

Correct answer: 90 km/h.

Once the built-up area ends, its traffic rules no longer apply. On a conventional road with no other specific limit, the general maximum for a passenger car is 90 km/h.

Real Decreto 1428/2003, de 21 de noviembre, por el que se aprueba el Reglamento General de Circulación · Real Decreto 1428/2003, de 21 de noviembre, por el que se aprueba el Reglamento General de Circulación