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The new crossing over the River Don, is an proposed plot comprising of a brand new car, cycle and pedestrian crossing at some point between the Danestone and Grandholm areas on the north side of the River Don, and the Tillydrone area the lake's south bank, at Aberdeen (figure 1.1). The River Don provides a natural barrier to north-south travel moves across both Aberdeen and Aberdeenshire. Inside the Aberdeen area, the River Don currently has two chief crossings factors; the Bridge of Don situated in the King Street and also A956 corridor; and Persley Bridge located in the A90 and Parkway corridors (Davidson, 2010, pp1). The bridges crossing over the Don have endured from congestion for many years, and in recent times have become known for possibly the most notorious bottlenecks over the Aberdeen street network. The congestion in and across these areas affects on both commuter motions and freight travel, with delays established as a regular source of frustration for all drivers (Davidson, 2010, pp2). Consequently, the principle impact of introducing a new crossing over the river Don will be a transport effect, specifically of a reduction in congestion using minimal negative environmental, economic or social influences. However, the core of Aberdeen's congestion issues is due to the allowance of suburban expansion and the growth of satellite settlements. With this comes the overwhelming reliance on the car as transportation for access to the town centre for employment, education and services (such asPatterson continuing car supply. Subsequently,.