Fall Season Sees Increased Deer-Vehicle Collisions in Massachusetts
The autumn months mark a significant rise in deer-related traffic accidents in Massachusetts, with 1,569 incidents reported from October through December 2024, according to the MassDOT Impact Crash Data Portal.
This spike coincides with the deer’s breeding season, known as the rut, when males are more active and less cautious, increasing the likelihood of crossing roadways unexpectedly.
Wildlife Expert Insight on Collision Risks
During the fall, hormonal changes trigger intense movement and territorial behavior in white-tailed deer, the predominant species in Massachusetts. This increased mobility, combined with shorter daylight hours and dense foliage obscuring deer from view, elevates the collision risk for drivers.
Experts note that deer typically move during dawn and dusk—times when visibility is low and traffic volume can be high, compounding the danger. Additionally, does seeking mates or food may suddenly dart across highways, making it challenging for motorists to react promptly.
Biological Factors Contributing to Seasonal Risk
- The rut typically occurs from late September through early December, driving male deer to travel greater distances.
- White-tailed deer have a keen sense of hearing and smell but rely heavily on sight, which can be impaired by vehicle headlights.
- Deer often travel in groups, meaning a single crossing can be followed by multiple animals, increasing collision chances.
This elevated deer activity during the fall not only impacts driver safety but reflects natural behavior critical for the species’ reproduction and survival.
Additional reporting and sources from: Fall brings higher deer collision risk for drivers
