Without restricting the scope of the first paragraph, no person may drive a road vehicle at a speed(1) of less than 60 km/h or more than 100 km/h on autoroutes;
(2) in excess of 90 km/h on numbered public highways surfaced with concrete, asphalt or a similar material outside cities, towns and villages;
(3) in excess of 80 km/h on other highways surfaced with concrete, asphalt or a similar material outside cities, towns and villages;
(4) in excess of 70 km/h on gravel highways outside cities, towns and villages;
(5) in excess of 60 km/h on earth highways outside cities, towns and villages;
(6) in excess of 50 km/h in cities, towns and villages, except on autoroutes and on highways or parts of highways on which the person responsible for maintenance of the highway has erected traffic control devices;
(7) in excess of 50 km/h in school zones when schoolchildren are entering or leaving school.