Questão jurídica principal
Whether the temporary 80 km/h speed limit was legally valid and binding in criminal proceedings
Decisão extraída
The speed limit was valid and binding; it was not void, and the driver had to comply with it.
Fundamentação extraída
The government was competent to order the temporary restriction under the signalization rules to reduce excessive pollution. Even if the underlying environmental situation had changed, any defect was not obvious and did not make the sign void.