What if I told you Seymour Road Over-Rail-Bridge is more than just a way to cross the tracks? It is a testament to Auckland’s growth and the challenges of connecting communities.
Seymour Road Over-Rail-Bridge facilitates movement. It ensures the smooth flow of traffic above the railway line. It connects people and places efficiently.
The Auckland Harbour Bridge faced similar challenges. Before its construction in 1959, ferries were the primary means to reach the North Shore. Imagine a 50 km detour via Northwestern Motorway then Massey and Riverhead. That is what people had to do.
Engineers proposed harbour crossings as early as 1860. Fred Bell planned floating pontoons. The idea was scrapped. It was too expensive. The cost was estimated at about $1.9 million in today’s money.
In the 1950s, North Shore was largely rural. It had a population of about 50000 people. The Auckland Harbour Bridge unlocked the area. It paved the way for Auckland’s expansion.
The initial Auckland Harbour Bridge design had five or six traffic lanes. It also had footpaths. Cost concerns led to a four-lane design without footpaths. This decision was later seen as short-sighted.
Dorman Long and Cleveland Bridge built the Auckland Harbour Bridge. They also built the Sydney Harbour Bridge. Construction took four years. The steel girder sections were made in England. They were shipped to New Zealand.
Labourers went on strike in 1956 and 1957. Stormy weather almost caused the loss of a main span. The tugboat William C Daldy battled high winds for 36 hours.
The Auckland Harbour Bridge opened on 30 May 1959. 106000 people walked across on an open day. Accidents during construction killed either three or four men.
The Auckland Harbour Bridge’s hollow girder design was new to New Zealand. It was outside the building codes. The National Roads Board and Auckland Harbour Board had competing specifications. Public Works commissioner Bob Norman helped negotiate a wider design.
By the 1970s, box girder bridges faced structural problems. Inspections found buckling in the Auckland Harbour Bridge. So the bridge’s girder system was strengthened.
The Auckland Harbour Bridge started as a toll bridge. Toll booths were at the northern end. Tolls began at 2/6 per car. Tolls were removed on 31 March 1984. The cost of collection outweighed the profits.
Critics claimed the State Highway 1 route over the Auckland Harbour Bridge was for toll revenue. This delayed the Western Ring Route. Inner-city suburbs suffered. Freemans Bay and Grafton were damaged.
Traffic increased. The Auckland Harbour Bridge needed more lanes. Japanese firm Ishikawajima-Harima Heavy Industries added two steel box girder bridges. These were the ‘Nippon clip-ons’. Each side added two lanes. The number of lanes doubled to eight.
The selection of a Japanese company was bold after WWII. The costs were higher than if the lanes had been provided initially.
The ‘clip-ons’ had issues. Cracks needed repairs in 1987. More cracks appeared in 2006. The clip-ons had an expected life of 50 years. Truck restrictions were introduced to reduce stress.
The Auckland Harbour Bridge operates a ‘tidal flow’ system. Movable barriers separate traffic. These barriers shift to accommodate peak traffic.
The Auckland Harbour Bridge has a proposed walk- and cycleway. Rail lines and walking paths were dropped for cost reasons. Protests have occurred regarding walking and cycling access.
The Auckland Harbour Bridge carries utility services. These include water and gas pipelines. It also carries fibre-optic telecommunications cables.
The Auckland Harbour Bridge is a tourist attraction. It offers bungy jumping and bridge climbs. Vector lights illuminate the bridge with LED lights.
The Auckland Harbour Bridge faces issues. These include resonance and seismic vulnerability. The bridge is also associated with suicide attempts. There was structural damage in 2020 due to high winds.
Seymour Road Over-Rail-Bridge may not be as famous. It shares a common purpose. It carries us over obstacles. It connects us to our destinations. Just like its larger cousin, the Auckland Harbour Bridge.