Despite jams on the controversial Bus Rapid Transit corridor in the Capital, transport authorities on Sunday claimed that the situation had improved since the trial runs began last Sunday. Transport Commissioner R. K. Verma said: "The traffic flow on Sunday was smooth and improving. We are still working on changing the signal pattern and hopefully a new one should be in place by this week.' Another official added: "None of the signal timings proposed has worked out well, so we have to keep seeing alternatives.'