Selection of external cordon line
- The external cordon line should cover the area which is already built up and also likely to be developed during the design period.
- The external cordon line Should contain all area of systematic daily life of the people oriented towards the city center and should effect be 'commuter shed '.
- The external cordon line should be compatible with previous studies of the area of studies planned for future.
- The external cordon line should be continuous and uniform in its course so that movement cross it only once.
- The line should intersect roads where it is safe and convenient to carry out traffic surveys.