THE SPIT BRIDGE the NSW Government on Friday 18 August 2006 Announced a $60M Plan to Add Two More Drawbridge Lanes to the Spit Bridge
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THE SPIT BRIDGE The NSW Government on Friday 18 August 2006 announced a $60m plan to add two more drawbridge lanes to the Spit Bridge. This is a very bad idea. The sole benefit will come in the form of modest time savings for counter-peak traffic. No benefit whatever will be gained by Northern Beaches residents who presently commute daily in the direction of the city. The plan offers no incentive for users of public transport and promises even greater congestion on Military Road and other thoroughfares in Mosman, Cremorne and Neutral Bay. A much more realistic plan – developed by Michael Darby and (then) Liberal Councillor David Dickman in 2002 – has long been displayed at the website http://michaeldarby.net/Tunnel.pdf. Note the alternate route displayed in white on page 4. This involves a single lane cable-stay high level bridge on the eastern side of the Spit Bridge and an elevated roadway across The Spit. The advantage is greatly reduced gradients and the disadvantages are greater length and increased visual impact. Let private enterprise invest in a switchable tunnel of one or two lanes from Manly Vale to Cammeray, which will bring enduring benefits to the residents of the Northern Beaches. Page 1 of 7 Switchable Public Transport THIS (SPT) Lane PRESENTATION IS GROWING. The cost-effective, practical method of alleviating traffic PLEASE RETURN congestion on the Spit Bridge and on Military Road is a SOON FOR MORE Switchable Public Transport (SPT) lane, mostly INFORMATION underground, from Manly Vale to Cammeray. The SPT lane will give priority to buses and taxis, with remaining The tunnel can capacity for E-tag trucks and E-tag public light buses; be constructed plus private cars, for which fees are automatically varied in single-lane or to keep average velocity at not less than 40 km/hr. The dual-lane form extra lane would operate city bound from midnight to midday Monday to Friday, and northbound from midday The case for a single lane tunnel to midnight Monday to Friday. On weekends the extra A typical single lane bored road tunnel requires excavation of lane would continue northbound from midnight Friday to around 91,000 cubic metres per kilometre, whereas a typical midday Saturday, then operate city-bound midday two-lane bored road tunnel requires excavation of around Saturday to midnight Saturday, then northbound 314,000 cubic metres per kilometre – more than three times as midnight Saturday to midday Sunday. The city-bound much. The cost saving with a single-lane tunnel permits direction continues from midday Sunday right through to investment in a high-tech stranded vehicle recovery system. midday Monday. Page 2 of 7 CLICK HERE FOR MORE ON THE SPT Benefits of the SPT lane will include: 1. Significant shortening of peak hour travel times The Future for buses and taxis, with increased productivity of both categories of vehicle. The SPT Lane will not detract from possible future 2. Reduction of congestion at Seaforth Round- developments, which could be a second single-lane or about and Sydney Rd – Manly Rd intersection. dual-lane tunnel, a multi-lane long tunnel, a railway, a 3. An end to the expensive and labour-intensive rubber-tyred mass transit system, or perhaps even a lane-swapping of the Spit Bridge. Note that the magnetic levitation system. Spit Bridge is presently a significant bottleneck only for counter-peak traffic, and there is no The SPT Lane provides a cost effective means of justification whatever for the stupid and expensive accelerating public transport, reducing the numbers of plan to build an extra two-lane drawbridge. trucks and buses on Military Road, and contributing 4. Significant reduction of bus and truck traffic on very positively to safety. Military Road through Mosman, Cremorne and Neutral Bay and greater effectiveness of short- Moreover, the SPT Lane is intended to be self funding. haul buses. 5. For SPT lane users, the distance from Manly There is every reason for the NSW Government to Vale to the City will be shortened by nearly a invite expressions of interest for putting the concept kilometre. The distance from the freeway at into practice. Cammeray to Manly Vale will be travelled by a bus in less than twelve minutes. Page 3 of 7 RETURN TO SPT PAGE 1 SWITCHABLE PUBLIC The cost effectiveness TRANSPORT (SPT) Proposed Tunnel of a single switchable LANE North lane is very significant. To alleviate congestion Balgowlah The proposed SPT on Military Road and tunnel will not detract on the Spit Bridge. Castlecrag from other contributions On Weekdays the lane to improving the lives of travels from north east Balgowlah Many-Warringah- to south west from Heights Pittwater commuters, midnight to midday, Middle which include Brian Harbour Kent’s St Leonards to and from south west to Northbridge north east midday to Brookvale railway plan midnight. The flow and Cr Jim Reid’s times are reversed on proposal for a rubber- weekends and public tyred mass transit holidays. system. Adelaide uses a For more detail see switchable highway following pages for commuters Mosman Balmoral Beach Page 4 of 7 RETURN TO SPT Cremorne PAGE 1 By reducing peak hour bus time Manly Vale to St Leonards Park from 30 Manly Vale minutes to 12 minutes, the tunnel will Seaforth N allow more daily journeys with the same number of buses, and demand for bus travel will increase because of the time saving. Trucks and taxis will also benefit. Private motorists will take up the remaining flow, using E-tag. The Myrtle Street Bridge Water depth exceeds requires modification with 50 metres, and this Proposed Tunnel twin arches replacing the will be reflected in centre pillar, to allow the the tunnel gradient median strip of the Burnt from Seaforth Up to Bridge Creek Deviation to three operate as the switchable north-east lane feeding traffic from portals Manly Vale to the tunnel midnight to midday, and accepting northbound Middle Spit Bridge See next vehicular output from the Harbour page tunnel midday to midnight. Page 5 of 7 RETURN TO SPT PAGE 1 Ventilation is by towers containing natural Proposed Tunnel gas burners which burn some pollutants See while heating the column of air so that it previous rises to a safe altitude before dispersing. page Northbridge Golf Planned tunnel Course traffic velocity is Middle 40kph (min), Harbour maintained by N automatic E-tag price variations displayed on approaches to Enquiries: Phone the portals and Michael Darby narrow cast on 02 9972 9316 FM radio. Cammeray Golf Crows Course Nest Two or more portals at south-west end of tunnel Page 6 of 7 RETURN TO SPT PAGE 1 Australia’s First One-Way Freeway Kindly contributed by Hilton Lenard State: South Australia The Southern Expressway, built in two stages between 1997 and 2001 is Start: Bedford Park - Main South Road the world's first fully reversible one-way freeway /expressway. Interchanges: Marion Road (Sturt), Main South Road/Panalatinga It was built parallel to Main South Road to provide a third major arterial Road (Reynella), Sherriffs Road (Lonsdale), Beach Road (Noarlunga road to the southern regions of Adelaide. Centre) Finish: Old Noarlunga - Main South Road While that sounds innovative, it was initially built that way to obviously cut Length: 21km costs as building freeways is something of a novelty to the South Direction Times: Northbound (Mon-Fri: 2:30am-1:30pm, Sat-Sun- Australian government. Public Holidays: 2:30pm-1:30am), Southbound (Mon-Fri: 2:30pm- 1:30am, Sat-Sun-Public Holidays: 2:30am-1:30pm). No traffic enters Nevertheless, upon opening day in late 1997 it was touted to be a failure 1:30pm-2:30pm and 1:30am-2:30am each day. but has in hindsight been a complete success as it has spread and Road Standard: All bitumen. diverted the once heavily congested Main South Road's traffic (for now, Road Quality: Excellent. Triple carriageway from Bedford Park to anyway). Reynella. Dual carriageway from Reynella to Old Noarlunga. Freeway quality for the entire length with emergency stopping lanes. Depending While Stage 1 was a breath of fresh air for driving into the southern on the direction, watch for the unusual right lane on and off-ramps as it suburbs, it was Stage 2 that has proven the greatest asset by bypassing can cause some surprise when the fast lane suddenly has to merge Morphett Vale and Reynella which was (and still is) an annoying and with entering traffic. painstaking slow journey to negotiate. Speed Limit (outside start and end points): 100km/hr - 80km/hr on the Tapleys Hill descent. The only sour point is that the absence of significant future provisions for either road widening or if one day the road really *does* need to be Click here for photos flowing in both directions. Still, in the meantime its a novelty and tourist attraction for those who live interstate - so visit South Australia and see the one-way freeway! RETURN TO SPT PAGE 1 Page 7 of 7.