“When there are multiple agencies that butt up against each other, like here, you often have all of the agencies running away,” Livingstone said. “But here ... every agency is really invested in working together in trying to solve the problem.”Traffic backup from BU BridgeA key issue affecting Cambridgeport is the traffic backup on the BU Bridge, often extending around the rotary and blocking the intersection at Granite, Brookline and Waverly streets.During the Commonwealth Avenue Bridge project, lane adjustments were made to the BU Bridge. Now, most of the road from Cambridge to Boston is a single lane, with two lanes in the other direction.Hamilton Street resident Stephen Kaiser said extending the single lane has made it more difficult for cars to access the adjacent lanes at Commonwealth Avenue, causing traffic to stretch into Cambridge.Neil Boudreau, a traffic engineer with MassDOT, has worked since September to identify causes for the increased traffic congestion. He said adjusting the lanes again would cause more gridlock.
One problem on the BU Bridge has already been identified. In speaking with city of Boston officials, Boudreau learned that a traffic detection system was damaged during the bridge project. The system, which recognizes cars waiting at the traffic light, was fixed by the city of Boston Oct. 29, Boudreau said. He did not yet know the impact on bridge traffic.The rotary and intersectionAnother problem involves the rotary itself. The cars backed up into the intersection of Brookline, Granite and Waverly streets also affect drivers who want to head away from the bridge.Wei, the Rockingham Street resident, said with the intersection blocked, cars cannot turn left from Granite Street onto Brookline Street, causing the Granite Street traffic to back up.The network of one-way streets means Granite Street is the only way out for some neighbors. Several people at the CNA meeting said cars drive the wrong way on one-way streets to avoid the congestion.Neighbors would like to see lane markings, signs and traffic lights for cars entering the rotary from Memorial Drive. For traffic approaching the rotary from Waverly Street, neighbors suggested signs advising cars not to block the intersection, with fines for offending drivers.
DCR could look at short-term solutions, including painting lines and putting up signs, Livingstone said. Long-term solutions for the rotary will be included in the third phase of DCR’s Memorial Drive project.Tree preservation leads to reduced spaceThe blocked intersection is not the only problem affecting Granite Street.To preserve a tree affecting sidewalk accessibility, the city of Cambridge routed the sidewalk into the street near the intersection, reducing the lane available for cars taking a right toward the rotary and contributing to congestion on Granite Street.As a temporary solution, seven parking spaces on Granite Street have been eliminated starting Oct. 29, Barr said, allowing drivers to start lining up sooner for the left turn onto Brookline Street.Barr said the city would continue to look at other solutions to address the intersection and surrounding streets.