cloverleaf
Interchange with four branches where the inside loops are for turning left and the direct links for turning right.
passing lane 
Far left traffic lane where faster-moving vehicles pass other traffic.
traffic lane 
Part of the roadway demarcated by lines, each accommodating a single line of vehicles.
slower traffic 
Far right traffic lane for slower-moving vehicles.
entrance 
Start of the acceleration lane, parallel to the traffic lanes.
freeway 
Large thoroughfare with separate one-way lanes and no crossing streets; reserved for high-speed traffic.
overpass 
Raised part of a road or highway on which traffic flows over another highway or obstacle.
loop 
Wide circular curve for moving from one highway to another in order to change direction.
ramp 
Connecting lane between two highways or between a road and a highway for changing direction.
highway 
Communications route connecting two distant geographic points, usually urban centers.
exit 
Start of the ramp for vehicles leaving the freeway.
broken line 
Line demarcating the two lanes of the roadway and showing that passing is permitted.
deceleration lane 
Temporary lane where vehicles slow down after leaving the traffic lanes.
side lane 
Temporary lane for vehicles intending to enter or exit the main lanes.
island 
Groomed land between the various lanes of an interchange.
traffic lanes 
Parts of the roadway demarcated by lines, each accommodating a single line of vehicles.
transfer ramp 
End of the ramp where it meets the highway entrance.
acceleration lane 
Temporary lane where vehicles entering the freeway gain speed in order to safely merge into the traffic lane.