Bengaluru, Dec. 28 -- Karnataka's vehicle emission monitoring system has all but collapsed, with over 400 Pollution Under Control (PUC) centres across the State shutting down after the Transport Department failed to supply mandatory hologram stickers for nearly a month.

Most of the affected centres are located at petrol bunks, disrupting routine emission testing and leaving thousands of motorists without valid PUC certificates, thereby exposing them to penalties during enforcement checks. Industry representatives have termed the situation a forced shutdown.

"We have had to keep our shutters down for the past eight days," said B.R. Ravindranath, former President, Karnataka State Petroleum Dealers' Association.

"Out of nearly 2,600 PUC c...