It will pass through three states-Karnataka, Andhra Pradesh and Tamil Nadu It allows vehicles to reach a maximum speed limit of 120 km/h (75 mph).

Finally, the 71 km (44 mi)-long Karnataka section of the expressway opened in December 2024, while the rest till Chennai is scheduled to be completed by August 2025.

[8][9][1][2][10] The expressway will bring significant socio-economic benefits and foster growth and development in Karnataka, Andhra Pradesh and Tamil Nadu, thus resulting in overall advantage to not only southern India, but also whole of the nation as one of the crucial economic corridors.

Owing to its immense significance in linking the two major capitals of Bengaluru and Chennai, additional space in between the lanes has been reserved for future use, so that the expressway can be expanded progressively in three phases to cater more traffic.

Foreign investment and land prices have already been rapidly rising for both industrial and real estate activities in the three states, ever since the project was finalised in 2022.

The Ranipet SIPCOT Estate has already received heavy investments from both domestic and foreign companies, such as Tata Motors' new vehicle manufacturing plant, to come up there by 2026-27.

[10][13][14] To bolster socio-economic growth and development, trade, investment, connectivity and tourism, the Ministry of Road Transport and Highways (MoRTH) introduced the idea of a direct expressway that would link two of the major metro cities of India, Bengaluru and Chennai, the capitals of Karnataka and Tamil Nadu in 2011.

These problems lead to increased risks of accidents and mishaps, making travel unsafe and unfit for future traffic.

[18] Then, the bidding process was started by the National Highways Authority of India (NHAI) in November 2020, after segmenting the project into a total of 10 packages.

[23] The pace increased since 2023 after deadlines were fixed for completion by January 2024, March 2024 and lastly to the end of 2024, and due to a close watch kept by the MoRTH to track its progress.

[31] This will lead to dramatic decline in carbon dioxide emissions, fuel consumption and pollution, mitigate traffic, increase speed, secure enhanced connectivity as a new direct and alternative traffic-free fast route, and promote environmental safety and sustainability.

Specifically, the major and renowned domestic and foreign companies that have invested along the expressway's route are Tata Motors, who has finalised to set up a ₹9,000 crore (US$1.0 billion) car manufacturing plant in Ranipet SIPCOT Estate, which lies in Nemili Taluk of Ranipet district, close to the expressway and near to the Ponapanthangal-Panapakkam road or SH-127A.