(こうそく)

こうそく
noun / prefix / na-adjective
high speed, express
See also: 拘束(こうそく) (restriction, restraint), 校則(こうそく) (school rules)
1. high speed
Moving or operating at a fast rate.
I'm going to Osaka by express bus.
I'm using a high-speed internet connection.
This new computer can process data at high speed.
2. expressway, highway
Short for 高速道路.
There was an accident on the expressway.
After getting off the expressway, it takes 20 minutes on regular roads. If there's no traffic, we'll arrive faster.
The expressway gets crowded on holidays, so let's leave early.

高速(こうそく) means high speed or expressway.

AS 'HIGH SPEED':

AS 'EXPRESSWAY':

CONTRAST: