Suburban rail project: KRIDE awards Rs 511 crore worth of civil works contracts for corridor 4 between Heelalige and Rajanukunte to speed up construction. Bengaluru: The Karnataka Rail Infrastructure Development Company (KRIDE) has awarded two civil works contracts worth a combined Rs 511 crore for corridor 4 of the Bengaluru Suburban Transport Project (BSTP)..The contracts, for packages 1 and 2, were awarded on October 29.