Road overview

Network diagram

  • Nishi-Seto Expressway
  • Seto-Chuo Expressway
  • Kobe-Awaji-Naruto Expressway

Road length and structural standards

Item National Route 28
Kobe-Awaji-Naruto Expressway
National Route 30
Seto-Chuo Expressway
National Route 317
Nishi-Seto Expressway
Total
Length 89.0km 37.3km 46.6km 172.9km
Structural Classification Classification Type 1 Class 2 Type 1 Class 2 Type 1 Class 3
Design speed
(km⁄h)
100 100 80
Lane 6 and 4 4 4 and 2
Long-span bridge (number) 2 6 9 17
Year of opening April 1998 April 1988 May 1999
Construction Cost 1.47 trillion yen 670 billion yen 730 billion yen 2.87 trillion yen
Akashi-Kaikyo Bridge (Kobe-Awaji-Naruto Expressway)
Akashi-Kaikyo Bridge
(Kobe-Awaji-Naruto Expressway)
Seto-Ohashi Bridges (Seto-Chuo Expressway)
Seto-Ohashi Bridges
(Seto-Chuo Expressway)
Kurushima-Kaikyo Bridges (Nishi-Seto Expressway)
Kurushima-Kaikyo Bridges
(Nishi-Seto Expressway)