I read that the traffic pattern changed a few years ago and they made NSR a one-way. I'm not sure that it worked, so I don't think any other changes will work either!
There was survey that was conducted by the ICLEI in 2013. They studied the bottlenecks on NSR Road. They planned to install barricades and foot bridges, and also manage the traffic better. Barricades would help, according to me.