Roundabouts in Newton I

Where could we use roundabouts in Newton? Let's start with the three corners of the City Hall triangle, Comm. Ave. at Homer/Lowell, Comm. Ave. at Walnut, and Walnut at Homer.

• Improve traffic flow
• Reduce the risk of accidents
• Provide better pedestrian and bicycle accommodation

Of course, those three factors are not site-specific, so add:

• Improve an intersection -- Comm. Ave. and Homer/Lowell -- where a young man died
• Provide high-visibility commitment to test the merits of roundabouts -- you can't get any higher visibility than City Hall
• Deal better with the awkward way Homer and Walnut meet Fenno
• Add a little wrinkle to future Boston Marathons