The Karnataka government is considering a congestion tax on single-occupancy cars on Bengaluru's busiest roads, including the Outer Ring Road, to tackle chronic traffic snarls. Discussed at a high-level meeting with industry leaders like Kiran Mazumdar-Shaw and Yulu co-founder R.K. Mishra, the plan is part of a 90-day roadmap to encourage carpooling, and ease road congestion.