sentence: Ramps connect the highways to smaller roads and other highways.
sentences_before: These kinds of highways have four lanes or more. They carry many vehicles. They have no traffic-lights or ground level intersections. All roads crossing the highway go over a bridge or a tunnel.
sentences_after: The place where highways meet these roads are called interchanges. Places where cars can leave or enter the motorway are called exits. Many freeways do not allow slower traffic, such as bicycles and pedestrians, to enter them.
concept_name: ramp
headings: Controlled-access highway
categories: Roads