Existing Vehicle Lanes The BorderTransportationSystem in places will be using existing road easements on both sides of the U.S.A. / Mexican border. If the optional Super-highway is built, then these existing roads can be incorporated into the system, else the roads must remain so that local traffic is not interrupted.  The easements though can be used for building the BorderTransportationSystem in part or in whole, which should reduce the cost of the system. Index of ...