About
Bengaluru Outer Ring Road (ORR) is a 62 km partial ring expressway around Bengaluru, comprising an outer arc that connects key IT corridor districts: Whitefield, ITPL, Marathahalli, Sarjapur, Outer Ring Road North, and Hebbal. While not a complete ring (unlike Hyderabad ORR), it is the spine of Bengaluru's IT corridor and home to major tech parks including Manyata Tech Park, Cessna Business Park, and Pritech Park.
The ORR was constructed in phases between 1995 and 2003 by BDA, with NHAI taking over major junctions and signal-free corridors after 2003. The road carries 600,000+ vehicles/day — making it one of the most heavily-trafficked urban expressways in India.
The ORR's economic significance is enormous: the Whitefield-Sarjapur belt along the ORR accounts for ~70% of Bengaluru's IT export revenue (₹4 lakh crore+ annually), home to 50+ tech parks and the Indian operations of Microsoft, Google, Amazon, Cisco, Intel, and many others. The 'ORR economy' is widely cited as India's largest single corporate-employer cluster.
The road has been chronically congested for the past decade as Bengaluru's IT growth outpaced infrastructure capacity. NHAI's planned Peripheral Ring Road (PRR — proposed 73 km outer ring beyond ORR) and Bengaluru Metro Phase 2 + Phase 3 are intended to relieve pressure.
Cross-references
13Indian Standards, IRC codes, and InfraLens knowledge articles that bear on this project's design and execution. Each link opens the relevant reference page.
Related calculators
4InfraLens calculators most relevant for expressway projects.
Notable features
- 62 km partial ring expressway around Bengaluru
- Spine of India's second-largest IT corridor
- Whitefield-Sarjapur belt accounts for ~70% of Bengaluru's IT export revenue
- 600,000+ vehicles/day — among India's most-trafficked urban expressways
- Home to 50+ tech parks (Manyata, Cessna, Pritech, etc.)