6. CALCULATING MINIMUM SIGHTING DISTANCE

WARNING
If the calculated minimum Warning times cannot be met, then Lookout
Working must not be used.

WARNING
When using additional Lookouts, five (5) extra seconds reaction time
must be added for each additional Lookout.

The minimum Warning time required shall be calculated as follows:
 reaction time (minimum five (5) seconds);
 time required to move the Workers, tools, equipment and materials clear of the
Danger Zone (determined in the test conducted by the PO); plus
 being in a Safe Place for a minimum of ten (10) seconds before Rail Traffic arrives.