6-713: The Ako-Adjei Interchange is a flyover in Accra , Ghana. Until 2005 it was known as the Sankara Interchange . The construction of interchange started in September 1997 and ended in December 1999. It was constructed during the Jerry Rawlings administration and was the first interchange to be built in Ghana. The interchange is located between Ring Road Central and Independence Avenue and
12-734: A higher, faster ramp that eventually bears left, but may be built as a right or left exit. A cloverleaf or partial cloverleaf contains some 270 degree loops, which can slow traffic and can be difficult to construct with multiple lanes. Where all such turns are replaced with flyovers (perhaps with some underpasses) only 90 degree turns are needed, and there may be four or more distinct levels of traffic. Depending upon design, traffic may flow in all directions at or near open road speeds (when not congested). For more examples, see Freeway interchange . A pedestrian overpass allows traffic to pass without affecting pedestrian safety. Railway overpasses are used to replace level crossings (at-grade crossings) as
18-581: A road only) in the United Kingdom and some other Commonwealth countries, is a bridge , road , railway or similar structure that is over another road or railway. An overpass and underpass together form a grade separation . Stack interchanges are made up of several overpasses. The world's first railroad flyover was constructed in 1843 by the London and Croydon Railway at Norwood Junction railway station to carry its atmospheric railway vehicles over
24-672: Is along Liberation Road in Accra with links towards the 37 Military Hospital, the Police headquarters . The site of the interchange was prior to its construction a major roundabout. The roundabout had several name changes from the Akuafo Roundabout to Redemption Circle to the Sankara Circle. The names given to the roundabout represented the identities and interests of various Ghanaian political leader in Ghana's political history. When construction of
30-477: The Brighton Main Line . In North American usage, a flyover is a high-level overpass, built above main overpass lanes, or a bridge built over what had been an at-grade intersection . Traffic engineers usually refer to the latter as a grade separation . A flyover may also be an extra ramp added to an existing interchange, either replacing an existing cloverleaf loop (or being built in place of one) with
36-673: The interchange begun in 1997 it was to replace the Sankara Roundabout. Upon completion the interchange was named the Sankara Interchange. Captain Thomas Sankara was a military ruler of Burkina Faso . The interchange was renamed after Dr. Ebenezer Ako Adjei , who was a lawyer and founding member of the United Gold Coast Convention (UGCC). Overpass An overpass , called an overbridge or flyover (for
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