Sharing the Road, Alcohol, and Other Drugs
Sharing the Road
Pedestrians and cyclists
Yield to pedestrians in crosswalks and at intersections. Cyclists are vehicle traffic: they ride with the flow of traffic, may take the full lane when needed, and you must leave at least three feet of clearance when passing them in Massachusetts. Before opening a car door, check for approaching bikes - dooring a cyclist is a common and serious crash.
Motorcycles and trucks
Motorcyclists are entitled to a full lane; never share a lane or pass within the same lane. Their narrow profile makes speed and distance hard to judge, so allow extra following room. Large trucks have big blind spots directly behind, alongside the cab, and off the right rear. Never linger beside a truck, and never squeeze between a truck and the curb at an intersection - trucks swing wide right and need that space. Trucks also need far more distance to stop than a car does.
Buses, emergency vehicles, and trains
Stop for a school bus with red lights flashing, whether you are behind it or approaching from the opposite direction - except on a divided highway, where only traffic on the bus's side must stop. Yellow flashing school-bus lights mean slow down and be ready to stop. When an emergency vehicle approaches with lights and siren, pull to the right and stop. Never try to beat a train; if the gates are down or the lights flashing, stop and wait.
Rule of thumb: If you cannot see the truck driver's face in the mirror, the driver cannot see you. Position yourself so you can see the mirrors, and pass quickly rather than cruising alongside.
Alcohol and Other Drugs
The numbers
Massachusetts OUI thresholds are 0.08% BAC for drivers 21 and over, 0.04% for commercial drivers, and 0.02% for anyone under 21 - the zero tolerance standard, where any measurable alcohol can cost a junior operator their license. Refusing a breath or blood test brings an automatic suspension under the implied consent law, even without a conviction; a first-offense refusal means at least 180 days.
What alcohol does
Alcohol is a depressant that impairs judgment first, before reaction time and coordination decline. That is why a driver who "feels fine" may already be making poor decisions. Only time removes alcohol from the body - coffee, food, cold air, and showers do not sober anyone up. A first OUI conviction in Massachusetts carries fines, possible jail time, and a one-year license suspension. You can be charged with OUI even below 0.08% if your driving shows impairment.
Other drugs
Prescription medicines, over-the-counter cold remedies, and marijuana can all support an OUI charge. Marijuana is legal for adults in Massachusetts, but driving under its influence is not, and consuming it in a vehicle is illegal. Mixing alcohol with any drug multiplies the impairment. Open containers of alcohol in the passenger area of a vehicle are illegal.
Worked example: A 20-year-old with a 0.03% BAC is over the legal limit for their age even though the reading is under 0.08%. Age decides which threshold applies, so always check who is driving before choosing a number.