under the mainline.; Complete interchange
: A junction where all possible movements between highways can be made from any direction.; Incomplete interchange
: A junction that is missing at least one movement between highways.; Ramp (NA), or slip road (UK/Ireland)

: A short section of road that allows vehicles to enter or exit a controlled-access highway.
:Ingressing traffic is entering the highway via an on-ramp or entrance ramp, while egressing traffic is exiting the highway via an off-ramp or exit