Access management and interconnectivity between properties is critical to maintaining a safe and efficient transportation system.  To help accomplish both, the use of roadways parallel to an arterial can be used.  A frontage road is normally located between the arterial and developed land.  The disadvantage to a frontage road is the need to move the intersection of it and cross streets away from the arterial.  This leads to inefficient use of space, higher costs and poor aesthetics.  A better design is to use a backage road (aka reverse frontage road), one that runs behind developed land.  Besides addressing the issues associated with a frontage road, it also allows for development on two sides of the road, thus increasing opportunity for economic development at a lower cost.