The Washington State Department of Transportation s North Central Regional Office offers construction and project development services. It administers local programs, as well as performs administration, financial, planning, maintenance and human resources functions. The office also provides traffic engineering, real estate, and safety and program management solutions. The Washington State Department of Transportation, also known as WSDOT, maintains bridges, roads and railroads. The department manages a staff of more than 7,000 full-time employees. It administers stormwater treatment and construction site erosion control programs. The Washington State Department of Transportation s local airport aid grant program provides financial assistance to over 135 state s public airports. The department performs and coordinates real estate transactions, as well as undertakes several design and build contracts.