It is the main access road of the Puriscal canton of San José province.

In San José province the route covers Puriscal canton (Santiago, Mercedes Sur, San Antonio, Chires districts), Mora canton (Colón, Guayabo, Jaris, Quitirrisí districts).

Received mayor improvements in 2019, where gabion walls were constructed near Puriscal downtown to stabilize the sides of the road, similar work was done at Route 317.

[1] On October 4, 2019, the central government announced plans to invest CRC ₡7,083,000,000 to pave with asphalt the 51.89 km gravel road between Puriscal and Parrita, due to its importance as an alternative route from the Greater Metropolitan Area to the Pacific.

[3] This route was severely damaged in November 2020 due to the indirect effects of Hurricane Eta.