0 8 ▁and ▁route ▁ 4 0 1 3 . ▁All ▁of ▁first ▁section ▁is ▁ 4 - land ▁( 2 ▁l ane ▁per ▁direction ) ▁as ph alt ▁with ▁island ▁as ▁median ▁between ▁direction . ▁It ▁goes ▁south - west ward ▁with ▁almost ▁level . ▁It ▁joins ▁Route ▁ 4 1 ▁at ▁Su an ▁Pak ▁j unction . ▁Total ▁length ▁is ▁about ▁ 3 5   km . ▁ ▁Second ▁section ▁starts ▁at ▁Ch ong ▁K ha o ▁j unction . ▁It ▁separate ▁from ▁Route ▁ 4 1 ▁on ▁the ▁north . ▁It ▁goes ▁west ward ▁parallel ▁to ▁Route ▁ 4 1 . ▁First ▁few ▁kilometer ▁of ▁this ▁section ▁is ▁ 2 - lane ▁as ph alt ▁and ▁run ▁along ▁hill ▁shoulder . ▁Then , ▁it ▁is ▁w iden ▁to ▁ 4 - lane ▁and ▁goes ▁into ▁Am ph oe ▁Th ung ▁Song . ▁It ▁turns ▁left ▁to ▁the ▁south , ▁pass ▁Route ▁ 4 1 ▁and ▁goes ▁into ▁Tr ang ▁Province . ▁It ▁finally ▁ends ▁by ▁joining ▁with ▁Route ▁ 4 ▁near ▁Am ph oe ▁Hu ai ▁Y ot . ▁Total ▁length ▁is ▁about ▁ 4 4   km . ▁ ▁Third ▁section ▁start ▁at ▁Am ph oe ▁M ue ang ▁Tr ang . ▁It ▁goes ▁south - west ward ▁and ▁ends ▁at ▁Am ph oe ▁Kant ang . ▁Total ▁length ▁is ▁about ▁ 2 0   km . ▁ ▁Origin ally , ▁the ▁first ▁and ▁second ▁sections ▁were ▁connected . ▁However , ▁when ▁Route ▁ 4 1 ▁section ▁Sur at