Our crews take care of the vegetation along the roadside to help travelers see signs, traffic and wildlife and to remove potentially hazardous trees, to control non-native species and to establish desirable native plant communities. Nurturing desirable native plants reduces maintenance and herbicide costs as they grow without constant care.
Our maintenance crews use integrated roadside vegetation management plans (IRVM) to select the right tools, techniques and timing, for taking care of the soil and greenery alongside highways.
Herbicides are useful tools for vegetation management and weed control. However, we recognize there may be potential impacts to health and the environment. Our crews use herbicides only when necessary and use is minimized whenever possible.
Roadside Vegetation Management Research WSDOT is committed to maximizing the efficiency and effectiveness of roadside maintenance and to minimizing herbicide use wherever practical.
During a two-year period, WSDOT disposed of 6,075 tons of litter and debris from roadsides across the state. The Department of Ecology estimates another 4,400 tons were collected on state and county roads during this time.
The Regional Road Maintenance Program improves roadway safety while safely maintaining our highways and following the Endangered Species Act.