Confirm tunnel driving speed, traffic direction (one-way or two-way traffic), road material, and material of tunnel wall. Measure the spacing of basic lighting, and determine the number and spacing of reinforcing lamps in the reinforcing section. CAD drawings (DWG DXF format) shall be provided to indicate the relative position of the lamps, the height of the lamps, the relevant spacing of the lamps, the space size, and other information.