Abstract: “the coordinate systems are so important for many civil engineering projects especially in road and railway projects. Universal Transverse Mercator projection with 6 degrees (UTM 6°) is used all over the world. Some problems may occur, one of these problems is increasing in distance distortion along the roads. This paper presents a new coordinate system for road networks using the theory of united projections "compound projection". A road connecting Sydney and Albury in Australia has been chosen for this study. The results obtained show a big improvement in the coordinates accuracy riches millimetre compared with the results obtained with UTM projection system”

Keywords: compound projection, coordinate system, Universal Transverse Mercator projection