Tunnel Maintenance and Closures
The January to December 2016 period saw 8 planned maintenance closures totalling 59 hours 30 minutes, equating to 0.68% of the year. For improvement works and training exercises the tunnel was closed for 8 hours 54 minutes and only 2 minutes for traffic incidents. To reduce the impact on traffic, planned maintenance and improvement works, and subsequent tunnel closures occur at night.
ERTO employs, on a regular basis, approximately 27 subcontract companies for maintenance works with an average of 85 workers engaged on the tunnel closure nights. ERTO enagage aproximately another 15-20 sub-contractor and suppliers on an add-hoc basis.