Amazing offshore urban expressways – pluses & minuses

A trend in arterial roadway building, especially in highly urbanized areas and locations of rough terrain, has been to construct expressways offshore, which largely parallel the coastline. There are several reasons for choosing these locations for highway construction, which include:

  • Little to no cost for right-of-way acquisition as the offshore site is not owned.
  • Less disruption of existing developed areas.
  • Less displacement of families and businesses.
  • Avoidance of existing congested areas during construction and after completion.
  • Avoidance of sensitive or rugged coastlines.
  • Avoidance of rock slides, landslides, and similar dangers.
Stunning aerial view of the Bandra-Worlin Sea-Link in Mumbai – Source: reddit.com

Despite the positive attributes identified above, there are also potential pitfalls that can give pause on whether to construct these offshore expressways. They include:

  • Maintenance costs for offshore highway repair and rehabilitation.
  • Poor visual and/or noise aesthetics of the expressway from both the coast and the water.
  • Risk of direct water pollution resulting from accidents occurring on the highway.
  • Dangers associated with hurricane, earthquakes, and tsunamis.
  • Lack of alternative routes if blocked by accidents or construction due to limited access points.
  • Impacts on aquatic wildlife.

Included in this post are images of some of these amazing, yet controversial, offshore highways from around the globe. Such expressways tend to be supported by two types of construction; one that is elevated on piers and/or bridges, and the other which is largely built on reclaimed land or on small artificial islands, such as was done for the majority of the segment of the E1 expressway shown below in Manila.

E1/R-1 Expressway near Manila – Source: maps.google.com

Please note that the examples included in this post is not meant to be a comprehensive or complete tall. Nor does this post include expressways that extend out into the sea to connect land masses, such as I-395 and I-195 in the Miami area, or expressways that cross large estuaries/bays like the Chesapeake Bay Bridge-Tunnel or the Hong Kong-Macau BridgeTunnel. Instead, it identifies some of the expressways that parallel the coast rather than running along side the coast on the land. As always, please feel free to forward me any additions, corrections, or suggestions. Peace!

_______

Busan, South Korea – Gwangan Bridge Highway (2003) = 7.4 km over water (see photos below)

Gwangan Bridge Highway – Source: maps.google.com

_______

Lagos, Nigeria – E1 /Third Mainland Bridge (1990) = 11.8 km over water – eight (8) lanes (see photos below)

E1/Third Mainland Bridge – Source: premiumtimesng.com
E1/Third Mainland Bridge – Source: maps.google.com

_______

Manila, Philippines – E3/Radial Road 1 Kawit Extension (2011) = 7.0 km on reclaimed land offshore – 4-5 lanes (see photo below)

E3/R-1 – Source: en.wikipedia.org

_______

Mumbai, India – Bandra-Worli Sea-Link (2010) = 4.7 km over water – eight (8) lanes (see photos below)

Bandra-Worli Sea-Link – Source: maps.google.net

_______

Reunion Island – RN-1/Route du Littoral (2022) = 5.4 km over water, six (6) lanes (see photo below)

Source: randoptions.re
Source: lantenne.com

_______

St. Petersburg/Clearwater, Florida – CR 611/Bayside Bridge Highway (1993) = 4.3 km over water – eight (8) lanes (see photo below)

Bayside Bridge Highway – Source: mapio.net

SOURCES:

This entry was posted in architecture, bridges, Cars, cities, commerce, economic development, environment, geography, Highway displacement, highways, infrastructure, Maps, nature, pictures, planning, product design, spatial design, sprawl, Statistics, topography, tourism, traffic, transportation, Travel, urban planning, Wildlife and tagged , , , , , , , , , , , . Bookmark the permalink.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

This site uses Akismet to reduce spam. Learn how your comment data is processed.