Things to consider when leaving town.......
Speed limits
Driving
speed must never exceed the speed at which the driver can maintain safe control
of the vehicle and bring it to a half on the carriageway or hard shoulder
This means that the distance needed to slow the car to a half
must be clear and free of any visible or anticipated obstacle the road ahead.
Adapting your speed
You must also adapt your speed to the state of the traffic, the weather, visibility, the weight of your load, the condition of your vehicle, and, above all, your own abilities. Do not base you're driving on what you think. Base it on what you see and on what you know.
Major roads mean high speeds. And high speeds are perfectly acceptable provided nothing gets in the way. Remember that hitting another vehicle at 40 km/h, which is not particularly fast, is equivalent to falling onto a concrete floor from a height of 10 meters for the occupants of the vehicles involved, the impact is murderous.