[10] The 5.6 km (3.5 mi) bridge was commissioned by the Maharashtra State Road Development Corporation (MSRDC), and built by the Hindustan Construction Company.

[13][14] Mahim Causeway was the only road connecting the western suburbs to Mumbai's central business district.

The project was commissioned by the Maharashtra State Road Development Corporation Limited (MSRDC).

Surveys of the seabed under the planned route were conducted before the bridge design commenced.

The marine geology underneath the bridge consists of basalts, volcanic tuffs and breccias with some intertrappean deposits.

The top of these strata are overlain by marine soil layer up to 9m thick consisting of dark brown clay silt with some fine sand overlying weathered, dark brown basaltic boulders embedded in the silt.

The 20,000 tonne Bandra-end span of the bridge deck is supported by stay cables within a very close tolerance of deviations in plan and elevation.

These included the highly variable geotechnical conditions due to the underlying marine geology of the seabed.

The foundations for the BWSL's cable-stayed bridges consist of 120 reinforced concrete piles of 2,000 millimetres (6.6 ft) diameter.

BWSL consists of twin continuous concrete box girder bridge sections for traffic in each direction.

Each bridge section, except at the cable-stayed portion, is supported on piers typically spaced 50 metres (160 ft) apart.

The modular expansion joints for the bridge were provided by the Swiss civil engineering firm Mageba.

[21] The viaducts were built utilising pre-cast, post-tensioned, segmental concrete-steel box girder sections.

An overhead gantry crane with self-launching capability was custom built on the site to lay the superstructure of the precast segments.

The Pre-Cast segments are joined using high strength epoxy glue with nominal pre-stressing initially.

A centre tower, with an overall height of 128 metres above pile cap level, supports the superstructure by means of four planes of cable stay in a semi-harp arrangement.

A centre tower, with an overall height of 55 metres, supports the superstructure above the pile cap level by means of four planes of cable stay in a semi-harp arrangement.

The superstructure comprises twin precast concrete box girders with a fish belly cross sectional shape, identical to the approaches.

At both ends, the toll collection options include: The bridge has a reliable and redundant power supply, backed up by diesel generators and auto mains failure panels for critical loads, such as monitoring, surveillance, emergency equipment and communication services including aviation and obstruction indicators.

The pillars and the towers supporting the bridge are protected by buoys designed to withstand explosions and collisions.

Due to Safety considerations, the BWSL is not accessible to pedestrians, and was not designed for them, according to the MSRDC's Satish Gavai.

However, citing the non provision of bicycles in the Motor Vehicles Act and the non requirement of licenses, riders have refused to pay penalties after being pulled over.

The other tactic by the traffic cops to deter bicyclists from entering is seizing and impounding of bicycles as well as to deflate their tires along with detention of riders, which has earned criticism and ire, as it constitutes an act of misconduct by police personnel and violation of rights of those owning non-motorized vehicles.

[35] The Financial Express has reported that even eight years after it was thrown open, the daily average traffic on the Bandra–Worli Sea Link — is smaller than a third of the original estimate.

[36] Latest statistics show the daily traffic count on the six-kilometre, predominantly cable-stayed bridge has dropped by over 11% in the past year, from 45,952 vehicles in 2011–2012 to 40,808 in 2012–2013.

High toll is considered a major contributing factor to people finding the bridge, a less attractive commuting option.

Although restricted for two and three-wheelers, there have been instances where bicyclists who entered the bridge from the Worli side have been slapped hefty penalties under various sections of the Motor Vehicles Act by traffic police personnel.

The action is deemed unconstitutional and constitutes as a misuse of power and corruption, as bicyclists cannot be penalized under any sections of the Motor Vehicles Act, even for the violation of entering the bridge.