Highway

The invention discloses a highway. The highway comprises a first carriageway group, a second lane group and an entrance and exit passage, wherein the running directions of the first carriageway group and the second lane group are opposite to each other; a central median is arranged between the first carriageway group and the second lane group. The central median comprises two emergency lanes, first isolation parapets and second isolation parapets, wherein the two emergency lanes are adjacently arranged; and the first isolation parapets and the second isolation parapets are positioned on the two sides of the emergency lanes. First left changing passages and first right changing passages are arranged on the first isolation parapets, wherein the first left changing passages are used for forbidding vehicles from changing to the right; and the first right changing passages are used for forbidding the vehicles from changing to the left. Second left changing passages and second right changing passages are arranged on the second isolation parapets, wherein the second left changing passages are used for forbidding vehicles from changing to the right; and the second right changing passages are used for forbidding the vehicles from changing to the left. The highway disclosed by the invention is advantaged in that a problem that emergency lanes are temporarily occupied can be effectively reduced and traffic flows of congested roads can be shunted in real time.