Is there a sign indicating where to park ?

There are usually no obvious parking signs on the highway. Turn left in advance and when you see a flat verge, stop slowly. There are also often towns and villages along the way, and the speed limit is usually 70 or 50. Find an intersection and turn left. You can park on the side of the road without a yellow dashed line.

Every so often, there will be a relatively wider position to facilitate temporary parking away from the main road. This is beneficial for passengers who are not very familiar with right-hand driving or driving slowly, as they can stop here and let the long queue of cars behind them go first, thereby relieving pressure.

There will be an empty space next to the main lane, it's very obvious, you can tell at a glance.