Important Notice
Construction Info
Useful construction information site
You can check information about large-scale construction works such as renewal works, Traffic Control Plan MAP, lane closure information, and more.
Route and time selection for a comfortable drive
To make using Expressway as comfortable as possible while construction is underway, why not start selecting your route (detour) and time of use?
Each construction project has its own dedicated website, which provides information to help you travel comfortably, such as detours and congestion times, and this page explains how to make the most of the construction project website.
Expressway Renewal Project
The Expressway Renewal Project aims to maintain the expressway network's functions safely over the long term. This will be achieved by taking essential and effective measures from the perspective of minimizing the life cycle costs of main body structures (all costs required until a structure's purpose is completed), preventive maintenance (maintenance conducted before damage and malfunctions occur), and performance improvement.
