i. On single line by one or two men as required following and proceeding the lorry at a distance of 600 m. on the BG and 400 m. on the MG & NG carrying a banner flag across the track and another man plainly showing a stop hand signal at a distance of not less then 1200 m. on the BG and 800 m. on the MG & NG from the lorry on either side.
ii. Each man shall be provided with detonators and place three on the line 10 m. apart immediately the lorry comes to a stand & fix the Banner flag across the track.
iii. In all cases where flag man in advance or in rear can not be kept in view from the lorry additional intermediate flag man shall be posted to relay the signals.