Statewide Noxious Invasive Pest Program (SNIPP)

Hawaiʻi’s highways do more than move people from place to place—they also pass through some of the most biologically rich and vulnerable landscapes in the world. Unfortunately, roads are also one of the primary pathways for invasive species to spread. Seeds, plant fragments, soil, and insects can be carried by vehicles and equipment, allowing harmful species to move quickly into new areas.

To address this risk, Hawaiʻi Department of Transportation (HDOT), Highways has contracted SWCA to implement the Statewide Noxious Invasive Pest Program (SNIPP), a long-term biosecurity initiative focused on preventing the introduction and spread of invasive species along state highway rights-of-way and other HDOT-managed lands.

SNIPP is a multi-decade program built around prevention, early detection, effective management, restoration, and collaboration. SWCA supports every stage of this effort, helping translate strategy into practical, field-ready solutions that fit within the realities of highway operations.

Our team brings expertise in invasive species survey and management, ecological restoration, GIS mapping, training development, and regulatory compliance to deliver solutions that are both scientifically sound and operationally feasible. Working closely with HDOT, we help design and implement invasive species and landscape management practices that protect natural resources while maintaining safe and efficient transportation corridors.

What SWCA Delivers

As part of SNIPP, SWCA provides a wide range of technical and implementation support, including:

• Statewide roadside invasive species surveys, covering hundreds of miles of highway each year to identify and map priority species
• Early detection and rapid response support, in coordination with local invasive species committees, to address new infestations before they spread
• Regular training workshops for HDOT maintenance staff and contractors on sustainable landscape maintenance and biosecurity best management practices
• Development of guidance documents to support ecological restoration and reduce long-term maintenance needs
• Development of best management practices and educational materials that help HDOT maintenance staff prevent the spread of invasive species during routine operations.

These efforts are designed to be practical, repeatable, and cost-effective, supporting HDOT’s operational goals while improving environmental outcomes.

By combining technical expertise, field implementation, and strong partnerships, SWCA helps HDOT lead by example. This approach demonstrates how transportation agencies can play a critical role in protecting Hawaiʻi’s ecosystems while delivering safe reliable infrastructure for the public.