What is Road Tunnel?
An underground passageway, esp one for trains or cars that passes under a mountain, river, or a congested urban area.
How Many Road Tunnels In South Africa?
- Chapman’s Peak Drive, Cape Town – M6.
- Cogmanskloof Tunnel, Western Cape
- Hartbeespoort Tunnel, North-West
- Hendrik Verwoerd Tunnels, Limpopo on the N1.
- Hex River Tunnels – Railway tunnels through the Hex River Mountains of the Western Cape Province.
- Huguenot Tunnel – a toll road tunnel near Paarl, also on the N1.
- J.G. Strijdom Tunnel, Mpumalanga
- Lang’s Nek Tunnel, KwaZulu Natal – a disused railway tunnel between Newcastle and Charlestown.
- Old Van Reenen Tunnel, KwaZulu Natal – just off the N3 – S 28° 22.272 E 029° 25.782.
- Daspoort Tunnel – Daspoort Tunnel is a road tunnel on the R55 in Pretoria.
- Overvaal Tunnel (Oogies)
- Watervalboven Tunnel, Mpumalanga – on the N4.
Which is the biggest tunnel in South Africa?
The Huguenot Toll Tunnel provides a route through the Du Toitskloof Mountains which separates Paarl and Worcester in the Western Cape, South Africa. It is South Africa’s longest road tunnel. The 3,9km long tunnel was opened in March 1988 and is 11km shorter than the route across the pass.
What are the functions of tunnels?
Tunnels are used for a wide variety of purposes. They provide essential links in many highways, railroads, and urban rapid transit systems. Urban water supply and distribution, sewage collection and disposal, hydroelectric power generation, flood control, and mining require extensive tunneling.
How are road tunnels constructed?
Bottom-up method: A trench is excavated, with ground support as necessary, and the tunnel is constructed in it. The tunnel may be of in situ concrete, precast concrete, precast arches, or corrugated steel arches; in the early days, brickwork was used. The trench is then carefully back-filled and the surface is reinstated.
What are the advantages of tunnels?
The advantages of tunnels and bridges are:
- Connect places separated by obstacles
- Help save time for travel
- Help in the reduction of traffic jams
- Avoid pollution due to traffic jams