This lot allows you to extend your highways under bridges. It is based on exactly the same idea than Petrouch's UnderBridgeRoad lot, released by Nietseb here. Therefore, to run it correctly, you will need the hole digger  by smoncrie.   To know how to run this lot, please read the UnderBridgeRoad Readme (french & english), my lot runs exactly the same way.   I added concrete borders that hide the tunnel, my little contribution to Petrouch's bright idea.   To install, just unzip "Autoroute sous pont.ZIP" in your SC4 plugins, it will set a .dat file that contains everything.   Note : in-game descriptions are in French, but if you aren't fluent with the "langue de Molière", ask me and I would translate ti in english or italian.   Don't hesitate to send me messages to ask me to add or remove something.