The Bangalore City traffic can be viewed at www.btis.in. This provides near-real-time (with a sub-2 minute lag). Go here to watch the live traffic status across Bangalore City.
Go here to watch the view across cameras at different junctions in Bangalore City.
Now wait! This is not just for Bangalore!! It's being done for Chennai, Hyderabad, Pune and Delhi as well!! I talked about Bangalore because of two reasons 1) The solution is in a mature stage for Bangalore 2) Bangalore has the worst traffic (and roads) amongst these cities...and Bangaloreans will thank Mapunity folks a zillion times for having given this solution.
Hyderabad Traffic solution will be hosted here.
Pune Traffic solution will be hosted here.
Delhi Traffic solution will be hosted here.