Boston, Mass. – Drivers and pedestrians across eastern Massachusetts face a stealth hazard early Thursday as black ice forms on untreated roads, bridges and sidewalks along I-93, I-95 and I-90 before the morning commute peaks.
Recent snowmelt combined with freezing rain overnight has allowed a thin glaze of ice to develop in spots where pavement temperatures slipped to 32 degrees or below. The danger is highest before 9 a.m., when surface temperatures remain subfreezing and visibility alone will not reveal slick patches.
According to the National Weather Service in Boston, black ice has formed overnight on untreated surfaces following the melt-and-refreeze cycle. Officials urge caution on roadways, parking lots and sidewalks, especially in shaded areas and near drainage grates where water tends to collect and freeze first.
Elevated roadways including the Zakim Bridge, Storrow Drive ramps and stretches of Route 128 are particularly vulnerable. Even small patches of ice can trigger spinouts or minor crashes during peak traffic periods.
Drivers should reduce speeds, increase following distance and avoid sudden braking. Pedestrians should wear footwear with good traction and use handrails where available.
Temperatures are expected to rise later this morning, which should gradually improve road conditions. However, any untreated surface may remain slick until readings climb safely above freezing. Additional advisories could be issued if icy spots persist beyond midmorning Thursday.
