Every year, the Washington State Department of Transportation (WSDOT) conducts a series of surveys on its highways in the state to measure traffic volume. This is expressed in terms of annual average daily traffic (AADT), which is a measure of traffic volume for any average day of the year. In 2011, WSDOT calculated that between 2,000 and 4,100 vehicles per day used the highway, mostly at the US 101 intersection.[4]
History
SR 102 was established in 1984 on the existing Dayton Airport Road northwest of Shelton.[2][5] Dayton Airport Road (Mason County Road 990) was built as an unpaved road by the 1940s and was paved by the 1970s.[6][7] A 1973 report to the state legislature recommended against including the road in the state highway system and estimated the costs to improve it to "acceptable standards" to be $417,000.[8] SR 102 was chipsealed by WSDOT in 2018 as part of improvements to US 101 in the area.[9]
^"Chapter 6: Highway Route Studies". Report of the Legislative Transportation Committee (Report). Washington State Legislature. January 1973. p. 21. Retrieved October 29, 2021 – via WSDOT Library Digital Collections.