дорога с разделительной полосой(A dual carriageway (BrE) or a divided highway (AmE) is a class of highway with carriageways for traffic travelling in opposite directions separated by a central reservation (BrE) or median (AmE). Roads with two or more carriageways which are designed to higher standards with controlled access are generally classed as motorways, freeways, etc., rather than dual carriageways.
wikipedia.org)
автомагистраль(в строгом словоупотреблении автострада; (В Англии сушествует официальное разделение понятий dual carraigeway и motorway, поэтому стоит найти два отдельных термина) Doronin)
