Modifications to existing concrete viaducts
North Hogebrug and Amkemaheerd.
The Skytrain is elevated on a prestressed concrete viaduct
supported on massive in-situ columns.
The idea of transforming the river from an ugly concrete viaduct
routing precious groundwater to the ocean is tantalizing to environmentalists.
It would be a reinforced concrete viaduct
called a skyway and would be a longer version of the Napa River Bridge on Highway 29.
A series of trials and tests have already been conducted with firms such as Laing O'Rourke and Network Rail, with probes on reinforced concrete viaducts
, multi-storey car parks and steel-framed buildings.