l ▁O blast ▁G link a , ▁Z ab ay kal sky ▁K rai , ▁a ▁sel o ▁in ▁Kh il ok sky ▁District ▁of ▁Z ab ay kal sky ▁K rai <0x0A> </s> ▁The ▁Northern ▁line ▁is ▁a ▁London ▁Under ground ▁line ▁that ▁runs ▁from ▁south - west ▁to ▁north - west ▁London , ▁with ▁two ▁branches ▁through ▁central ▁London ▁and ▁three ▁in ▁north ▁London . ▁It ▁runs ▁north wards ▁from ▁its ▁southern ▁termin us ▁at ▁ ▁in ▁the ▁bor ough ▁of ▁M erton ▁to ▁ ▁in ▁South w ark , ▁where ▁it ▁div ides ▁into ▁two ▁central ▁branches , ▁one ▁via ▁ ▁in ▁the ▁West ▁End ▁and ▁the ▁other ▁via ▁ ▁in ▁the ▁City . ▁The ▁central ▁branches ▁re - join ▁at ▁ ▁where ▁the ▁line ▁again ▁div ides ▁into ▁two ▁branches , ▁one ▁to ▁ ▁and ▁the ▁other ▁to ▁ ▁in ▁the ▁bor ough ▁of ▁Bar net . ▁The ▁High ▁Bar net ▁branch ▁has ▁an ▁additional ▁single - station ▁sp ur ▁at ▁ ▁with ▁a ▁sh utt le ▁train ▁to ▁. ▁ ▁For ▁most ▁of ▁its ▁length ▁it ▁is ▁a ▁deep - level ▁t ube ▁line . ▁The ▁portion ▁between ▁ ▁and ▁ ▁opened ▁in ▁ 1 8 9 0 ▁and ▁is ▁the ▁oldest ▁section ▁of ▁deep - level ▁t ube ▁line ▁on ▁the ▁Under ground ▁network . ▁About ▁ 2 9 4 ▁million ▁passenger ▁jour ne ys ▁were ▁recorded ▁in ▁ 2 0 1 6 / 1 7 ▁on ▁the ▁Northern ▁line , ▁making ▁it ▁the ▁bus iest ▁on