Route
SH 40 runs 16.9 km from Vairengte, Mizoram to Kolasib, Mizoram.
Crosses Assam and Mizoram.
Through Vairengte and Kolasib.
Why it matters
SH 40, Vairengte–Kolasib State Highway, crosses the border between Assam and Mizoram. A state road that runs through more than one state has no single owner — Assam PWD (Roads) and Mizoram PWD each maintain the stretch inside their own state, so which department to contact depends on where along the road you are.