The primary problem occurs at point A on the map. Traffic coming off Carlton Street either must go straight onto University Road to enter Storrow Drive, or turn left onto Commonwealth Ave but to then get into the far right lane to cross the BU Bridge to Cambridge. Simultaneously, the right of way is afforded to the very heavy pedestrian traffic crossing University Road at point A. Cars simply end up backing up in the intersection as they wait for pedestrians. Meanwhile, cars trying to exit Storrow Drive, back up at Point A, waiting for a break in the pedestrian traffic. As a result, the short opening of time when they could safely turn onto Commonwealth Ave (which is just as the Commonwealth Ave light turns red, and just before the traffic from Carlton Street enters the roadway) is only occasionally free of pedestrians. As a result, cars and pedestrians jockey for an opening.
In fact, this very problematic intersection, which during BU Football games and Red Sox games can virtually reach a standstill, could be improved with two fairly inexpensive changes which would not force a redesign of the intersection:
1) The best solution would be a pedestrian tunnel underneath or bridge above University Ave. This would have the following advantages:
a) Protect the safety of pedestrians, including the thousands of students who live and attend school in the area.
b) Alleviate the timing problem created when the one open opportunity for traffic exiting Storrow Drive via University avenue, coincides with pedestrians wanting to cross. Thus more traffic could exit at the right time when Commonwealth Avenue is relatively clear.
c) Eliminate the jockeying that occurs when pedestrians and traffic fight for the right moment to cross.
2) The second best solution would be a pedestrian light across University Ave.
Either of these would improve safety, allow traffic to enter Commonwealth Ave from University at intervals which allow the greatest number of cars to flow, reducing backups that sometimes even backup Storrow Drive. In the absence of action, we are going to see cars running into each other on Commonwealth Ave in the right or second to right lane as well as pedestrians getting hit.
And MASS DOT solution to the whole problem? Yellow pedestrian signs!!