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LocationTypeCons-truct- ionLen (km)LanesCost (m$)Notes
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MiamiCars/ Trucks2010 - 20141.24610twin 41 ft wide(13m) tunnels, 2 lanes each direction, via tunnel boring machine, esp to get 4500 trucks/day headed for Miami port off of City streets, cost includes widening a bridge. Open summer 2014.
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Dublin HarbourCars/ TrucksJun 2001 to Dec 20064.54752twin tunnels each 11.7m wide with 2 lanes of traffic, 1/3 by boring machine, 2/3 by cut&cover, costs here include 1.1km of above ground roadway as well,
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BrisbaneCars/ Trucks2006 - 20104.743200Twin Boring Machines-2 parallel tubes under downtown, Opened Mar 2010, 80km/hr, 100K veh/day, Cost includes 2KM for above-ground freeway, tunnel with multiple entrances/exits along its length
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AucklandCars/ Trucks2009- 20140.43320Cut&Cover freeway in 1 direction underneath downtown to improve traffic flows onto the Harbour Bridge
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Madrid M30: South BypassCars/ Trucks2003- 20078.33497The south bypass is one of 15 tunnels with total length of 56km on the M30 ring road. The south bypass is an 8,344m, three-lane infrastructure divided into two tunnels, of which 7,212m was built by 15m-diameter TBMs
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OaklandCars/ Trucks2010 - 20131.042420Bored through a hill, two 12ft lanes, 10ft shoulder on the right, 2ft shoulder and 3ft walkway on the left
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Udhampur IndiaCars/ Trucks2011- 20169290013.3 mi , 2 lanes, + 5m escape tunnel - Bored through mountains using New Austrian Tunnel Method (NATM)
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Wan Chai Hong KongCars/ Trucks2011- 20173.7630000Bypass tunnel under downtown to alleviate congestion, 2027 AM peak traffic 3800 W-E and 2300 E-W with approx 10% light trucks and 10% heavy trucks. Opened 2019
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Calgary Runway tunnelCars/ Trucks2011- 20140.626295Decision to tunnel future planned extension of major arterial road under runway during runway construction. Technique: Cut & Cover/Excavation. Open May 2014.
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Seattle viaduct replacementCars/ Trucks2012- 20152.742100Waterfront bi-level freeway to be replaced with 4-lane bi-level tunnel constructed with Tunnel Boring Machine. The $3.137billion cost (Jul 2016 view) includes the tunnel, connecting ramps, a port-truck overpass, rebuilt Alaskan Way surface street, and viaduct demolition. 1$ to 4$ toll charge depending on time of day. Opened 2020
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Sydney North Connex tunnelCars/ Trucks2015- 2019942900Two parallel 2-lane tunnels interconnecting 2 existing freeways. Current interconnection is a City arterial road congested with thousands of trucks/cars. CPPIB is an investor in the project. Opened 2020.
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Shenzhen-Zhongshan Link Cars/ Trucks2020- 2024585km 8-lane immersed tube tunnel combined with bridge sections on either side to form a total 24km link
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Fehmarn Belt fixed linkCars/ Trucks/ Trains2023- 202918410,00018km immersed tube tunnel from Denmark to Germany under Baltic Sea
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Fraser River Tunnel ReplacementCars/ Trucks2026- 20301.1841506 car lanes and 2 bus lanes to replace the existing 4 lane Fraser River tunnel
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Auckland TunnelThe project seeks to balance the capacity of the Auckland Harbour Bridge traffic by managing the traffic flow through St Mary's Bay and across the Victoria Park Viaduct to Wellington Street on the Southern Motorway. The project aims: to Make best use of the capacity of the Harbour Bridge
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Miami TunnelCurrently, around 4,000 eighteen-wheelers daily make their way in and out of the Port of Miami causing congestion in Miami’s Central Business District and affecting Port access for other vehicles. The tunnel will divert that freight traffic and create a direct connection to the interstate highway system....No, flammable, combustible, or hazardous materials (as defined by the Code of Federal Regulations (CFR) 49 Transportation, Chapter 1, Subchapter C) will not be allowed in the tunnel. Operational Summer 2014.
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Dublin Tunnelprimarily to divert trucks serving harbour from downtown streets, cars can use but must pay toll so don't clog up tunnel from serving trucks, carries approx 10,000 trucks / day
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Hong KongNote, tunnel costs include approx 1km of above ground elevated freeway, and many other components as well --> not clear on actual tunnel costs
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CalgaryNew Airport runway obstructs path of future extension of major arterial road. Decision to tunnel road under runway during runway construction to save on future costs. Tunnel being built now even though need for the road extension is not forseen for some years into the future. Road expected to carry 15,000 cars per day Completed May 2014
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SeattleConstructed with a 56 ft diameter tunnel boring machine (custom built in Japan). Viaduct being replaced carries 110,000 cars and 3700 trucks (serving port of Seattle) daily. Part of larger overall 3.1B$ project. Funding: 1.5B state gas taxes, 400m$ Federal, 400m$ tolls, 57m$ City of Seattle. Tunneling begins 2013. A city-wide plebiscite was held to ask if public supported it (support 60%, oppose 40%). Dangerous Goods not allowed in tunnel. Recovers 22 acres of waterfront for redevelopment.
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SydneyNorth Connex Project: Two parallel 2-lane tunnels to interconnect between 2 freeways. Will bypass a City arterial road and move thousands and trucks and cars underground.
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DenmarkAt 17.6 km (10.9 mi), it will be the longest ever constructed, surpassing the current largest immersed tube tunnel, which spans 6.75 km (4.19 mi) across the Pearl River Estuary in China as part of the Hong Kong–Zhuhai–Macau Bridge. The world's longest immersed tunnel, it will be the "world's longest combined road and rail tunnel; the world's longest under water tunnel for road; the deepest immersed tunnel with road and rail traffic; and the second deepest concrete immersed tunnel." The size of the project is about five times the tunnel part of the Øresund Link between Denmark and Sweden, currently the "longest immersed concrete tunnel."
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