Page 783 - Week 03 - Thursday, 21 May 1992
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(3) The capital costs involved in providing a roundabout at an average intersection would be similar to that for traffic signals, that is around $150,000 to $200,000. This does not include land costs.
(4) The question refers to the intersection of Weston Parkway and Dairy Flat Road. There is no such intersection. If, however, the question was directed at the intersection of the Eastern Parkway and Dairy Flat Road, I am able to provide the following advice.
A Clover Leaf intersection is not being considered for use at the intersection of the Eastern Parkway and Dairy Flat Road because of the high capital costs involved and limited space.
(5) No. After this intersection was opened the traffic signal controls were left unlinked to allow traffic patterns to settle down and be assessed. This necessarily resulted in some inefficiency until linking was provided on 27 April 1992. This intersection is now considered to be operating efficiently.
(6) No. The use of roundabouts at the intersection of an arterial road such as Limestone Avenue and local residential roads is not an appropriate treatment and is not recommended in the Austrian guidelines on the design of roundabouts. The work at Limestone Avenue was undertaken for the purposes of pavement reconstruction. It was not intended to undertake a major redesign of all intersections along Limestone Avenue.
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