Akita Expressway (Yamauchi PA to Yokote IC)
Progress of the 4-lane expansion project

Construction area

Current progress

Current progress
Explanation of progress status

  • 1. Ainonobashi

    Ainonobashi

    Taken in October 2025

  • 2. Tsuchibuchi Tunnel

    Tsuchibuchi Tunnel

    Taken in October 2025

  • 3. Yokote Tunnel

    Yokote Tunnel

    Taken in October 2025

  • 4. Shinmachi Bridge

    Shinmachi Bridge

    Taken in October 2025

Past construction photos can be found here.

March 2025

  • 1. Ainonobashi

    Ainonobashi

    Taken in March 2025

  • 2. Tsuchibuchi Tunnel

    Tsuchibuchi Tunnel

    Taken in March 2025

  • 3. Yokote Tunnel

    Yokote Tunnel

    Taken in March 2025

  • 4. Shinmachi Bridge

    Shinmachi Bridge

    Taken in March 2025

October 2024

  • 1. Ainonobashi

    Ainonobashi

    Taken in October 2024

  • 2. Tsuchibuchi Tunnel

    Tsuchibuchi Tunnel

    Taken in October 2024

  • 3. Yokote Tunnel

    Yokote Tunnel

    Taken in October 2024

  • 4. Shinmachi Bridge

    Shinmachi Bridge

    Taken in October 2024