Expressway vehicles travel separately, only allow vehicles to exit, at certain points
Answer 2 is incorrect because the content is different vehicles travel in opposite directions separate, missing only allow vehicles to exit, at certain points
As a road for motor vehicles, there is a divider separating the road for two-way vehicles running separately; not intersecting at the same level with one or other roads; which is fully equipped with service equipment and maintenance. ensure continuous and safe traffic, shorten the journey time and only let the vehicle in and out at certain points.
Is a road only for motor vehicles running at high speed, with a divider separating the road for vehicles traveling in opposite directions; not intersecting at the same level with other roads; fully equipped serve to ensure traffic, safety and shorten journey time.