How does the Tokyo Bay Aqualine connect Kanagawa and Chiba prefectures?

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Tokyo-Yokohama Metropolitan Area Portion of the Tokyo skyline at dusk; Tokyo Tower is at the right.

The Tokyo Bay Aqualine, also known as the Trans-Tokyo Bay Highway, connects Kawasaki in Kanagawa Prefecture on the western shore of Tokyo Bay to Kisarazu in Chiba Prefecture on the eastern shore.1

The route facilitates this connection through a combination of engineering structures:
* A 5.9-mile (9.5-km) undersea tunnel1
* A 2.7-mile (4.4-km) bridge1
* An artificial island constructed within the bay1

Opened in 1997, this infrastructure significantly reduces travel time across the bay within the Tokyo-Yokohama metropolitan area.1