Barriers to Climbers One of the easiest things to do is to climb a fence or wall, it only takes a rope and a hook, or a ladder.  The concept behind the BorderTransportationSystem is that it will NOT be simple to enter the roadways, and it will be very difficult to scale the center dividers.  To this end our team looked at several ideas and came up with the following: Index of ... Sideways U Shape Center Divider Upside down U shape Center Divider top Support for the Railroad / Pipeline system Support for the Solar Cell Panel system Support for the Wind Turbine tower system