The road from Bengaluru to Chennai has never been short, but it has always been significant. The two cities anchor the Deccan plateau’s southern economy on east and west — Bengaluru the technology and aerospace city facing the Arabian Sea approach, Chennai the port city and auto-manufacturing capital facing the Bay of Bengal. NH-75 connecting them via Hosur, Krishnagiri, Ranipettai, and Sriperumbudur covers approximately 340 kilometres in 5 to 6 hours through commercial truck traffic, grade crossings, and the inevitable urban congestion at both ends. The Bengaluru-Chennai Expressway will change that calculation to 3 hours on 262 kilometres at 120 km/h.
The Bengaluru-Chennai Expressway — designated National Expressway 7 (NE-7) — is a four-lane, greenfield access-controlled expressway under construction by NHAI under the Bharatmala Pariyojana at a cost of approximately ₹17,000 to ₹18,000 crore. It runs from Hoskote in Bengaluru North district (Karnataka) to Sriperumbudur in Kanchipuram district near Chennai (Tamil Nadu), passing through Karnataka, Andhra Pradesh, and Tamil Nadu. Karnataka’s three Phase-1 packages totalling 71 kilometres were completed and opened on December 9, 2024 — the first section to become operational, covering Hoskote to Bethamangala.
As of early 2026, the expressway stands at different completion stages across its three states. The Byreddypalli-to-Bangarupalem section in Andhra Pradesh (31 km) remains the last package to complete — 80 to 90 percent done as of early 2026 with a revised target of July 2026. The full expressway is expected to be operational by mid-2026. Once complete, it will be 80 kilometres shorter than the existing NH-75 route and will reduce distance between Bengaluru and Chennai to about 262 kilometres from the current 340 kilometres.
Bangalore to Chennai Expressway Overview
| Detail | Information |
| Official Name | Bengaluru-Chennai Expressway (NE-7 / National Expressway 7) |
| Maintained By | NHAI |
| Length | 258–263 km |
| Lanes | 4-lane (expandable to 6 by 2037; 8 by 2041) |
| From | Hoskote, Bengaluru North District, Karnataka |
| To | Sriperumbudur, Kanchipuram District, Tamil Nadu |
| States | Karnataka, Andhra Pradesh, Tamil Nadu |
| Programme | Bharatmala Pariyojana (Hybrid Annuity Model) |
| Project Cost | ₹17,000–₹18,000 crore |
| Karnataka Section (Phase 1) | 71 km — opened December 9, 2024 |
| Full Completion Target | Mid-2026 (last AP section: July 2026) |
| Distance Saved | ~80 km shorter than existing NH-75 route |
| Travel Time | 3 hours (vs current 5–6 hours) |
| Design Speed | 120 km/h |
| Connects To | Chennai Port-Maduravoyal Expressway (spur to central Chennai) |
| Industrial Corridor | Promotes Chennai-Bengaluru Industrial Corridor |
| Phase 1 | Karnataka — 3 packages; Hoskote–Bethamangala; fully open Dec 2024 |
| Phase 3 Status | AP and TN packages — 3 packages at ~90%, 1 package at ~64% (AP); target July 2026 |
Route and Location
The expressway starts at Hoskote in Bengaluru’s northeastern fringe — the industrial and logistics zone that also connects to the Bengaluru-Vijayawada Expressway. It runs eastward through Kolar district’s granite landscape in Karnataka, crosses into Andhra Pradesh’s Chittoor district through the dry Deccan plateau, enters Tamil Nadu’s Ranipettai district, and terminates at Sriperumbudur — Chennai’s western industrial township housing Samsung, Nokia, Hyundai, and Foxconn manufacturing plants.
Connectivity
At Hoskote, the expressway connects to the Bengaluru-Vijayawada Expressway and the NH-44 corridor toward Bengaluru’s city core. At Sriperumbudur, the Chennai Port-Maduravoyal Expressway provides a 20.6-km spur into central Chennai — making this the gateway from the national highway network into Chennai’s port economy. The expressway promotes the Chennai-Bengaluru Industrial Corridor — a government programme designed to attract manufacturing investment across its three-state route.
Nearby Areas
Kolar Gold Fields — India’s historic gold mining district near the Karnataka section — is accessible from the expressway. Vellore, with the CMC Vellore medical complex (one of India’s largest hospitals), draws patients from across southern India and is near the Tamil Nadu section. Sriperumbudur, the expressway’s southern end, also carries historical significance as the location where former PM Rajiv Gandhi was assassinated in 1991.
Frequently Asked Questions (FAQs)
Q1. What is the Bangalore to Chennai Expressway?
A: NE-7, a 258 to 263-km, four-lane greenfield expressway from Hoskote (Bengaluru) to Sriperumbudur (Chennai) through Karnataka, Andhra Pradesh, and Tamil Nadu. Cost ₹17,000 to ₹18,000 crore.
Q2. How much will the Bangalore-Chennai Expressway reduce travel time?
A: From 5 to 6 hours to approximately 3 hours — at 120 km/h on an 80-km shorter route than existing NH-75.
Q3. How much of the Bangalore-Chennai Expressway is complete?
A: Karnataka’s full 71-km Phase-1 opened December 9, 2024. Remaining AP and TN sections are 80 to 90 percent done; last package targets July 2026.
Q4. How many lanes will the Bangalore-Chennai Expressway have in future?
A: Starting at 4 lanes, expanding to 6 by 2037 and 8 by 2041 — following the same expansion model as the Delhi-Mumbai Expressway.
Q5. What industrial corridor does the Bangalore-Chennai Expressway promote?
A: The Chennai-Bengaluru Industrial Corridor — a national manufacturing investment zone designed to attract industrial clusters along the three-state expressway route.