The shuttle truck collided with a truck on Interstate 93 southbound in the city 's downtown neighborhood at about 6 pm . Both drivers were taken to hospital with non - life - threatening injuries . As officials did n't want to risk running trains under the over - loaded truck , replacement shuttle buses were run for southbound passengers . On the highway there were also massive crashes .
The box truck collided with a car on Interstate 93 southbound in the city 's Dorchester neighborhood at about 6am . Both drivers were taken to hospital with non-life-threatening injuries . As officials did n't want to risk running trains under the over-hanging truck , replacement shuttle buses were run for southbound passengers . On the highway there were also massive delays .