The first consideration during any installation or maintenance of drainage features is the safety of both the work crew and the motorist. Therefore, remember to follow these safety procedures:

• Assure workers have proper Personal Protective Equipment.
• Before any excavation begins, determine if underground utilities are in the area.
• Follow safe trenching operation techniques.
• Comply with confined space requirements.
• Be aware of crushing hazards and pinch points.
• Be aware of loose materials, excavation drop-offs, tripping hazards, uneven ground.
• Avoid walking and working under suspended loads.
• Determine escape routes in case of emergency.

In addition, before work begins, it is important to set up proper work zone traffic control. Appendix B provides three typical traffic control plans that may be applicable depending upon the type of work being performed-- use layout no. 1 (6H-1) when the work is beyond the shoulder area; use layout no. 2 (6H-6) when the work is being done on the shoulder, and use layout no. 3 (6H-17), if the work is a moving operation such as for cleaning out curb inlets. These are for illustrative purposes; refer to the Manual on Uniform Traffic Control Devices for more detailed guidance.