When any roadway has been divided into lanes, a driver of a vehicle shall drive so as to be entirely within a single lane and shall not move from the lane in which he is driving until he has first ascertained that such movement can be made with safety.
The driver of a vehicle shall not overtake and pass a vehicle proceeding in the same direction unless there is sufficient clear space ahead on the right side of the roadway to permit the overtaking to be completed without impeding the safe operation of any vehicle ahead or behind.
The driver of a vehicle when about to be overtaken and passed by another vehicle approaching from the rear shall give way to the right in favor of the overtaking vehicle, on a suitable and audible signal being given by the driver of the overtaking vehicle, and shall not increase the speed of his vehicle until completely passed by the overtaking vehicle.
A. 
No person shall drive in such a manner as to obstruct unnecessarily the normal movement of traffic upon any street or highway. Officers are hereby authorized to require any driver who fails to comply with this section to drive to the side of the roadway and wait until such traffic has been delayed has passed.
B. 
No driver shall block an intersection or crosswalk with their vehicle.
The driver of a vehicle shall not follow another vehicle more closely than reasonable and prudent, having due regard for the speed of such vehicle and the traffic upon, and condition of, the street or highway. Upon roadways less than 27 feet wide and upon which vehicular traffic is permitted to operate in both directions, the driver of any slow-moving vehicle, when traveling outside of a business or residential district, shall not follow another slow-moving vehicle within 200 feet, but this shall not be construed to prevent such slow-moving vehicle from overtaking and passing another slow-moving vehicle. This section shall not apply to funerals or other lawful processions.
The driver of any vehicle, before starting, stopping, turning from a direct line or backing, shall first see that such movement can be made in safety. If the operation of another vehicle should be affected by a stopping or turning movement, the driver of such vehicle shall be given a plainly visible signal, as required by the following section.
A. 
Any signal herein required shall be given in sufficient time in advance of the movement indicated to give ample warning to any person who may be affected by said movement, and shall be given either by means of the hand and arm in the specified manner, or by a suitable mechanical or electrical device, except that when a vehicle is so constructed or loaded as to prevent the hand or arm signal from being made or from being visible both to the front and rear, the signal shall be given by a suitable device.
B. 
Hand and arm signals, as required, shall be made by using left arm extended out the driver's window:
(1) 
An intention to slow down or stop should be indicated by extending your left arm downward with your palm facing backward.
(2) 
An intention to turn left turn should be indicated by extending the left arm straight out through the window.
(3) 
An intention to turn right should be indicated by extending your arm at a 90° angle upwards.
A. 
Every driver of a vehicle, railway car or other conveyance, approaching an intersection of ways where there exists facing him an official sign, bearing the word "STOP" and authorized by this section, and such approval being in effect, shall, before proceeding through the intersection, bring such vehicle, railway car or other conveyance to a complete stop at such point as may be clearly marked by a sign or line, or if a point is not so marked, then at a place between the said stop sign and the nearer line of the street intersection. In the case of a line of two or more vehicles approaching such stop sign, the drivers of the second and third vehicles in the line in any group shall not be required to stop more than once before proceeding through the intersection. This section shall not apply when the traffic is otherwise directed by an officer or by a lawful traffic regulating sign, signal or device.
B. 
In accordance with the foregoing, erection and maintenance of official stop signs are authorized so as to face:
Sector 1 Stop Signs
Blossom Lane at Martins Pond Road
Broadmeadow Road at Farmers Row
Chestnut Hill Road at Martins Pond Road
Court Street at Main Street
Cow Pond Brook Road at Hoyts Wharf Road (X2)
Cow Pond Brook Road at Lowell Road
Culver Road at Smith Street
Fletcher Hill Lane at Forge Village Road
Gay Road at Boston Road
Gay Road at Lowell Road
Gilson Road at Forge Village Road
Graniteville Road at Lowell Road
Hayden Road at Forge Village Road
Hemlock Park Drive at Lowell Road
Hidden Valley Road at Whiley Road
Higley Street at Farmers Row
Higley Street at Peabody Street
Hollis Street at Main Street
Hoyts Wharf Road at Cow Pond Brook Road (X2)
Hoyts Wharf Road at Old Dunstable Road
Indian Hill Road at Old Ayer Road
Island Pond Road at Old Dunstable Road
Lost Lake Drive at Lowell Road
Lowell Road at Main Street
Martins Pond Road at Hollis Street
Martins Pond Road at School House Road (X2)
New Pond Road at Forge Village Road
Old Ayer Road at Boston Road
Old Carriage Path at Forge Village Road
Old Dunstable Road at Lowell Road
Orchard Lane at Martins Pond Road
Orr Road at Forge Village Road
Peabody Street at Farmers Row
Peabody Street at Old Ayer Road
Powderhouse Road at Main Street
Raddin Road at Chicopee Row
School House Road at Lowell Road
School House Road at Martins Pond Road
Smith Street at Farmers Row
Smith Street at Old Ayer Road
Stonebridge Way at Forge Village Road
Sunset Road at Boston Road
Whiley Road at Boston Road
Worthen Drive at Old Ayer Road
Sector 2 Stop Signs
7 Overlook Drive at Meadowview Road
180 Wharton Row at 91 Wharton Row (Loop)
Arbor Way at Cherry Tree Lane
Arlington Street at Main Street
Arlington Street at Mill Street
Bixby Hill Road at Pepperell Road
Breakneck Road at Longley Road
Castle Drive at Pepperell Road
Champney Street at Hollis Street
Champney Street at Main Street
Common Street at Hollis Street
Common Street at Nod Road
Crosswinds Drive at Townsend Road (X2)
Elm Street at Main Street
Elm Street at Pleasant Street
Fitches Bridge at Main Street
Fox Run at Pepperell Road
Gratuity Road at Mill Street
Hickory Lane at Jenkins Road
Hill Road at Maple Avenue (X2)
Hill Road at Pepperell Road
Hill Road at West Main Street
Integrity Way at Pepperell Road
Jenkins Road at Mill Street
Joy Lane at Farmers Row
Joy Lane at Shirley Road (2 signs)
Kemp Street at Pepperell Road
Kemp Street at Townsend Road
Kirk Farm Road at Meadowview Road
Kirk Farm Road at Nashua Road
Legion Road at School Street
Long Hill Road at Farmers Row
Longley Road at Hollis Street (right-turn direction)
Magnolia Lane at Cherry Tree Lane
Maple Avenue at Hill Road
Maple Avenue at Pepperell Road
Meadow View Drive at 102 Overlook Drive
Meadow View Road at Nashua Road
Mill Street at Canterbury Lane
Mill Street at Main Street
Mill Street at Pleasant Street
Nashua Road at Longley Road
Nod Road at Main Street
Paquawket Path at Longley Road
Pepperell Road at Townsend Road
Reedy Meadow Road at Chicopee Row
Reedy Meadow Road at Nashua Road
Riverbend Drive at 71 Wintergreen Lane
Riverbend Drive at Long Hill Road
Rockwood Lane at Townsend Road
Sand Hill Road at Longley Road
School Street at Hollis Street
School Street at Main Street
St. James Avenue at Pepperell Road
St. James Avenue at Townsend Road
Taylor Street at Main Street
Throne Hill Road at Pepperell Road
Town Forest at West Main Street
Townsend Road at Townline Road
Townsend Road at Townline Road (Townsend's Proctor Road)
Townsend Road at West Main Street
Wallace Road at Pepperell Road
West Main Street at Townsend Road (sign coming off bridge)
West Street at Main Street
Wharton Row at Town Forest (All 4 signs)
Wharton Row at West Main Street
Whiting Avenue at Elm Street
Windmill Hill Road at Townsend Road
Wintergreen Lane at 156 Riverbend Drive
Wyman Road at Nashua Road
Wyman Road at North Street
When such roadways as are divided by an island, plot, reservation, or by any structure or other area reserved from the traveled road, drivers of vehicles shall keep to the right of any such divisions, except when otherwise directed by an officer, signs, signals or markings.
No operator shall enter upon the road surface of any street or highway or section thereof when, by reason of construction, surface treatment, maintenance or the like, or because of some unprotected hazard, such road surface is closed to travel, and one or more signs, lights or signals have been erected to indicate that all or part of the road surface of the street or highway is not to be used, or when so advised by an officer, watchman, member of a street or highway crew or employee of the Town, either audibly or by signals.
A. 
It shall be the duty of each driver in a funeral or other procession to keep as near to the right edge of the roadway as is feasible and to follow the vehicle ahead as closely as is practicable and safe.
B. 
At an intersection where a traffic control signal is operating, the driver of the first vehicle in a funeral or other procession shall be the only one required to stop for a red or red and yellow indication.
C. 
At an intersection where a lawful stop sign exists, the driver of the first vehicle in a funeral or other procession shall be the only one required to stop before proceeding through the intersection.
No vehicle shall be driven or moved on any street or highway, nor shall any owner of any vehicle knowingly permit such vehicle to be driven or moved on any street or highway, unless such vehicle is so constructed or loaded as to prevent its contents from spilling, dropping, sifting, leaking or otherwise escaping therefrom. Vehicles loaded with any material which may be blown around by the wind shall be suitably covered to prevent the contents from being blown upon the streets or highways.
The driver of a vehicle emerging from an alley, driveway or garage shall stop such vehicle immediately prior to driving onto a sidewalk or onto the sidewalk area extending across the alleyway or driveway.