"The project to rehabilitate and upgrade the Kirkop, Santa Venera, Tal-Qroqq and Ta’ Giorni tunnels ended up costing the taxpayer €14.7 million - €3 million per kilometre of lane"

https://timesofmalta.com/articles/view/tunnels-upgrade-cost-147m-mostly-direct-orders-pn-mp-jason-azzopardi.913524