Highways provide a good example where deployment of new BTS" s is not only cost ineffective but under utilization of BTS capacity. In most practical situations providing coverage to highways provides convenience and for emergency purposes, but BTS capacities along highways are extremely under utilized. Also with growing intolerance from subscribers to call drops, operators are force to provide coverage along the full stretch of the highway.
                                                                                                                                               

The diagram illustrates a simple deployment of a repeater to extend coverage to a road around a mountain. Highways tend to be long winding roads obstructed by hills in between, leaving blinds spots where the BTS signals can not reach. Installing a repeater will provide coverage into this area, without a repeater to extend coverage; mobiles traveling around the hill will result in a call drop.