Does experience in Level One and Level Two count toward the four years' experience you need to be an accompanying driver?
Yes, that experience counts.

Why can't I drive on high-speed expressways, in Level One?
High-speed collisions cause more damage than those at lower speeds. That's why it makes sense to reduce the risks while you practise in Level One. When you have more driving skills, you'll have a better chance of reacting quickly to avoid collisions.

There are always roads you can use instead of 400-series highways and expressways, but if you do need to use a high-speed road, your accompanying driver can take over.

You may practise on high-speed roads with a licensed driving instructor as your accompanying driver.

Why must there be a seat belt for every passenger?
Seat belts are the best way to avoid injury in a collision. This condition lets you drive with family and friends and at the same time ensures that the vehicle is not over-crowded and everyone is protected in case of a collision.