I am unable to find specific information on WorkSafeBC regulation 18.3.3(1) regarding alternative safety measures when barriers, rerouting, or detours are prohibited by the Ministry of Transportation. However, I can provide general safety guidance based on industry best practices.

When it is not possible to eliminate worker exposure to traffic with measures such as barriers, rerouting or detours, you must minimize worker exposure to traffic by applying control measures that:

• Are appropriate to the work activity
• Are consistent with the risk assessment
• Include, in order of priority:
• The use of temporary traffic control devices and traffic arrangements or layouts and procedures to effectively protect workers from traffic travelling by or through a work zone without the use of traffic control persons
• Administrative controls that reduce the number of workers exposed to traffic, such as scheduling work during off-peak hours
• The use of traffic control persons only after the control measures set out in subparagraphs (i) and (ii), either alone or in combination, have been considered and determined to be insufficient to manage traffic in the circumstances. [1]