Specifies the computer based procedures applicable to Category A lighting for use in the derivation of installation design data or for the direct calculation of light technical parameters to determine compliance with the requirements of AS 1158.1. It describes the use of a computer program, designated SAA STAN, for the calculation of light technical parameters on straight sections of road. The source code for the program, on a 13 cm IBM-formatted flexible disk (designated AS 1158.2S), is provided with the Standard. The program is written in the FORTRAN language and complies with Subset FORTRAN 77. The disc contains a text file which gives information on the implementation of the program. Information on the use of the program for road lighting calculations is given in AS 1158.2.