Mount Tangkuban Perahu and discharges into the Bay of Ciasem, Java Sea, traversing Ciasem, Subang Regency, around 90 km east of the capital Jakarta. Asem
Bogor Ciamis, Ciamis Ciampea, Bogor Ciampel, Karawang Cianjur, Cianjur Ciasem, Subang Ciawi, Bogor Ciawi, Tasikmalaya Ciawigebang, Kuningan Cibadak, Sukabumi
entering Subang Regency, Route 1 runs for 5.7 km eastwards, and then turns northeastwards for 28 km, passing through the subdistricts of Patokbeusi, Ciasem, Blanakan