Roadside public facilities include safety roadside rest areas, weigh stations, park and ride lots and vista points. Maintenance of such facilities includes a range of custodial responsibilities that may include restrooms, fountains, picnic areas, and other public facilities. Maintenance of appurtenances such as roadway surfacing, signs, pavement markings, buildings, landscaping and electrical installations may also occur in conjunction with maintenance of these facilities.

Potential pollutant sources at public facilities can include trash, litter, sewage, chemical vegetation control, erosion, illegal dumping, graffiti, spills and leaks, resulting in sewage, pesticides, sediment, sandblast grit, paint, fuel, hydraulic fluid and oil entering the environment. To prevent such pollution, recommended environmental stewardship practices include illicit connection/discharge reporting and removal, scheduling and planning, safer alternative products, illegal spill discharge control, vehicle and equipment fueling, vehicle and equipment maintenance, solid waste management, liquid waste management, sanitary/septic waste management, concrete waste management, spill prevention and control, material use, material delivery and storage, maintenance facility housekeeping practices, litter and debris, sweeping and vacuuming, anti-litter signs, potable water/irrigation and water conservation practices.[N]

The following environmental stewardship practices are recommended for graffiti removal: [N]

• Schedule graffiti removal activities for dry weather.
• Protect nearby storm drain inlets prior to removing graffiti from walls, signs, sidewalks, or other structures needing graffiti abatement.
• Clean up afterwards by sweeping or vacuuming thoroughly, and/or by using absorbent and properly disposing of the absorbent.
• When graffiti is removed by painting over, implement the procedures under Painting and Paint Removal.
• Direct runoff from sand blasting and high pressure washing (with no cleaning agents) into a landscaped or dirt area. If such an area is not available, filter runoff through an appropriate filtering device (e.g. filter fabric) to keep sand, particles, and debris out of storm drains.
• If a graffiti abatement method generates wash water containing a cleaning compound (such as high pressure washing with a cleaning compound), plug nearby storm drains and vacuum/pump wash water to the sanitary sewer.
• Consider using a waterless and non-toxic chemical cleaning method for graffiti removal (e.g. gels or spray compounds).

The electrical area of activities includes all work performed on highway facilities used for control of traffic (e.g., traffic signal systems, highway and sign lighting systems, toll bridge electrical systems and other related systems). Detector loops are electrical sensors used to trigger a traffic control signal at an intersection and/or for long-term traffic counts. Installation of detector loops is accomplished by cutting into the road surface with a concrete saw, inserting electric wire into the cut and sealing the cut with loop sealant. Subtasks include support vehicle operation, sawcutting, hauling and disposal and pavement repair. Pollution control activities focus on ensuring that debris and maintenance and repair materials remain controlled and are not released to the environment.

• Control potential pollution from concrete, sealant, fuel, hydraulic fluid and oil. Utilize stormwater protection practices, including illicit connection/illicit discharge reporting and removal, scheduling and planning, illegal spill discharge control, vehicle and equipment fueling, vehicle and equipment maintenance, solid waste management, concrete waste management, liquid waste management, material use, water conservation practices and sweeping and vacuuming.
• Water applied during sawcutting operations should be controlled to prevent unpermitted non-stormwater discharges.