Traffic Tunnel

Tunnel, Traffic


a tunnel built at the intersection of heavily traveled urban traffic arteries to allow various types of vehicles to cross the intersection at different levels (see). Special structures or sections of roadway may be provided to allow pedestrians to cross traffic arteries (seePEDESTRIAN CROSSING). The placement of traffic tunnels is coordinated with the system of urban traffic circulation, the planning of streets and construction along them, and the installation of underground cables and sewers.

A traffic tunnel usually has a two-grade profile. As a rule, such a tunnel consists of one enclosed (tunnel) section and two open (ramp) sections that provide for the flow of traffic in two directions. Three lanes in each direction are customary in the USSR.

Traffic tunnels are constructed at a shallow depth and most often in open trenches. The enclosed section of a traffic tunnel is usually made of precast reinforced concrete in the form of a closed, two-bay frame. The open (ramp) sections consist of retaining walls, reinforced-concrete foundation blocks, and a drainage chute, which are combined into a single structural system by concreting the joints. Traffic tunnels are protected against water penetration by a waterproof lining. A reinforced-concrete framework is cast along the upper parts of the ramp walls and serves as a base for a parapet. Lampposts and the supports for trolley-bus power lines are usually installed on the parapet.


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References in periodicals archive ?
In the event of a fire in a uni-directional traffic tunnel, there would be a queue of vehicles formed in the area upstream of the fire.
Earlier this year, in the same area, we saw the Gotthard Base Tunnel's opening ceremony - at 35 miles, it's the longest traffic tunnel in the world.
Tenders are invited for Consultancy Services For Good For Tender Design Based On Detailed Investigations, Costing And Preparation Of Technical Schedules Of Epc Documents1 Const Of Additional Bridge Adjacent To The Existing Bridge Construction Of Chisopani Traffic Tunnel
I asked my new friend: Can we as a people, in good conscience, spend P1 billion for a traffic tunnel in Makati and P200 billion for a subway that would link Makati, SM Mall of Asia and Global City, while people including thousands of children live in housing that cripples the human heart?
The War Memorial Park traffic tunnel project on Buckle Street in Wellington, New Zealand is scheduled to be completed by ANZAC Day in 2015, marking the 100-year anniversary of the Gallipoli campaign commemorating all New Zealanders killed in war and honoring returned servicemen and women.
Under normal conditions it's a traffic tunnel like a bypass through the city and then it's closed off and used as a bypass for flooding.
While Worcester residents can probably remember at least one renovation of the traffic pattern for automobiles at Lincoln Square (the famous rotary there was done away with years ago), this one relocated the railroad as part of the three-phase, $10 million project that buried the railroad under Belmont Hill, created an automobile traffic tunnel as well, and above ground, created the rotary and a base for the World War I monument.
The exhibition will also showcase the traffic tunnel, monitoring system, road and traffic management, road safety and traffic and training institutes, equipment for fire and safety sector including detection and protection equipment, fire safety and fire-fighting equipment, weather information systems, and medical equipment including ambulances, emergency and health equipment, and other equipment.
The exhibition will also showcase the traffic tunnel, monitoring system, road and traffic management consulting, road safety and traffic and training institutes, automotive safety features, equipment for fire and safety sector which include detection and protection equipment, fire safety and fire-fighting equipment, personal protective equipment and management of weather information systems and medical equipment includes ambulances, emergency and health equipment, first aid, medical and other equipment.
A EUR660mILLIoN traffic tunnel which opened less than a year ago is not making the cash expected because truck drivers don't use it.
Less than an hour later, the flame had to be extinguished again while it was being carried out of a Paris traffic tunnel by a female athlete in a wheelchair.