on-ramp
US /ˈɑːn.ræmp/
UK /ˈɑːn.ræmp/

1.
匝道, 入口匝道
an inclined road or ramp leading from a road or highway onto another highway or freeway
:
•
Take the next on-ramp to merge onto the interstate.
從下一個匝道進入高速公路。
•
There was heavy traffic on the on-ramp during rush hour.
高峰時段,匝道上交通擁堵。