into suburban Santee, where the route terminates just north of the SR 52 interchange. Traffic can continue onto SR 52 or Mission Gorge Road at the terminus. SR 125 is part of the California Freeway and Expressway System, and is part of the National Highway System, a network of highways that are considered essential to the country's economy, defense, and mobility by the Federal Highway Administration. The route is eligible to be included in the State Scenic Highway System, but it is only a scenic highway from SR 94 to I-8 as designated by the California Department of Transportation (Caltrans), meaning that it is a substantial section of highway passing through a "memorable landscape" with no "visual intrusions", where the potential designation has gained popular favor with the community. In 2018, SR 125 had an annual average daily traffic (AADT) of 10,200 vehicles between the Otay River Bridge and Olympic Parkway, and 183,000 vehicles between SR 94 and Lemon Avenue, the latter of which was the highest AADT for the highway. History Route 67 Added to the state highway system in 1933, and defined in 1935, Route 198 extended from US 80 onto La Mesa Boulevard and Palm Avenue to SR 94 by 1938. In 1947, the San Diego County Highway Development Association requested that the highway from Sixth Avenue in Mission Valley to US 80 be constructed as a freeway. Although state senator Fred Kraft criticized the proposal in July 1953 because he believed that it would be too expensive and would not reduce congestion in the long-term, especially around the junction with US 80 in Grossmont, approval for the Route 94 freeway extended to the junction with US 80 by October, with the Grossmont part of the route signed as Route 67. The Route 67 freeway was completed in March 1957, from Campo Road and Route 94 to US 80; the project was completed for $1,625,000 (about $ in dollars). Planning and Poway extension Planning for what would become SR 125 north of I-8 began in 1954. Route 282 was defined as a route from Brown Field through La Mesa extending to Route 277 in 1959, and in 1961 the latter terminus was changed to Route 278. The California Highway Commission selected a route for the highway in mid-1963. In the 1964 state highway renumbering, SR 125 was designated as the highway from SR 75 near Brown Field