Mechanical, chemical, and cultural methods can help maintain the structural integrity of the highway and enhance highway safety. Proper follow-up management techniques should be implemented to discourage establishment of undesirable vegetation, to prevent soil erosion, and to reduce potential fire hazards. Cultural and biological management techniques help improve growing conditions of desirable plants and discourage establishment of undesirable plants that can adversely affect the structural integrity and public safety of the highway. Most cultural and biological techniques will have no adverse impacts on the integrity and safety of the highway. Each treatment technique potentially could pose a threat to humans.
Workers using heavy machinery or hand tools are at potential risk from accidents.
Contact with certain plants may cause eczema or erythema. Risk from biological control methods would be extremely remote.