The so-called Mestre beltway is the 32.3-kilometer-long highway section of the A4 that avoids crossing the former urban section of the A4, now renamed the A57 – Mestre beltway.
It was opened to traffic on February 8, 2009, and includes three lanes plus an emergency lane.
There are 9 underground sections, 8 tunnels and 4 viaducts along the ring road.
Daily traffic: 51 thousand vehicles (average)
- Lighting systems
- Traffic lights
- Electrical substations
- Variable message panels
- Traffic control systems
- Radio broadcasting
- Smoke detectors and fire suppression system
- 2 control rooms (1 for traffic, 1 for systems)
- 2 toll stations