EAST BROOKFIELD, Mass. — A suburban intersection that was slated for a routine safety upgrade in 2022 remains in a state of perpetual, weekly-shifting geometric configuration due to an unresolved professional feud between two regional transit planners.
The intersection of State Route 9 and Maple Street, originally a standard four-way stop, was converted into a modern roundabout to reduce T-bone collisions. However, a fundamental disagreement over the "deflection angle" — the sharpness of the turn required to enter the circle — has prevented the project from ever reaching completion. Instead, the East Brookfield Board of Selectmen instituted a temporary compromise that is now entering its fourth year: the "Alternating Geometry Accord."
Under the terms of the accord, the roundabout’s physical layout is altered every Sunday night. On odd-numbered weeks, the intersection is configured according to the "Radial Approach" model favored by Dr. Arthur Vance, a senior consultant for the Central Massachusetts Transportation Authority. On even-numbered weeks, crews re-stripe the asphalt and shift temporary plastic barriers to reflect the "Continuous Slip-Lane" philosophy championed by Elena Rostova, the district’s chief highway engineer.
"Ms. Rostova’s model treats motorists like water molecules in a highly pressurized pipe, prioritizing velocity over civic mindfulness," Dr. Vance said during a town council hearing on Tuesday, gesturing to a laser-pointed diagram of a 14-degree approach vector. "My configuration forces a deceleration event that encourages drivers to contemplate their environment. It is a humanistic curve."
Rostova, who has published three monographs on modern asphalt dynamics, dismissed Vance's approach as "romantic obstructionism."
"Dr. Vance is forcing 21st-century commuters to perform a geometric ritual that belongs in the era of the horse-drawn carriage," Rostova said in an interview. "Our data shows that my continuous-flow model reduces idle times by up to 11 seconds, provided drivers do not hesitate. The hesitation is a cultural failure, not an engineering one."
Local residents have spent years adapting to the shifting asphalt. Commuters must consult a color-coded calendar on the municipal website before leaving for work to determine whether they will encounter Vance’s tight, defensive lanes or Rostova’s wide, fluid sweeps.
"On Rostova weeks, you have to assert dominance or you’ll spin around forever," said resident Thomas Hennessey, who passes through the intersection daily. "On Vance weeks, you have to brake so hard your groceries fly into the footwell. My GPS has stopped giving directions here. It just says 'Prepare for Variable Geometry' and goes silent."
The dispute shows no signs of resolution. A proposal to settle the matter by installing a standard traffic light was rejected by both parties as an intellectual surrender. Instead, the Board of Selectmen recently approved a $140,000 grant to study a third, proposed "Double-Lobed Peanut" configuration submitted by a Swiss consulting firm, which would introduce a three-week rotation cycle starting this autumn.