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According to the United States Census Bureau , the city has a total area of 16.8 square miles (43.6 km 2 ), of which 15.6 square miles (40.5 km 2 ) is land and 1.2 square miles (3.1 km 2 ), or 7.21%, is water. Portsmouth is drained by Sagamore Creek and the Piscataqua River . The highest point in the city is 110 feet (34 m) above sea level, within Pease International Airport.
The city is crossed by Interstate 95 , U.S. Route 1 , U.S. Route 4 , New Hampshire Route 1A , New Hampshire Route 16 , and New Hampshire Route 33 . Boston is 55 miles (89 km) to the south, Portland, Maine , is 53 miles (85 km) to the northeast, and Dover, New Hampshire , is 13 miles (21 km) to the northwest.
Did You Know

QuestionIn the United States, the term 'full trailer'is usedfor a freight trailer supported by front and rear axles and pulled by a drawbar. This term isslightlydifferent in Europe, where a full traileris knownas an A-frame drawbar trail. A full trailer is 96 or 102 in (2.4 or 2.6 m) wide and 35 or 40 ft (11 or 12 m) long.

QuestionTrailer stability can be defined as the tendency of a trailer to dissipate side-to-side motion. The initial motion may be caused by aerodynamic forces, such as from a cross wind or a passing vehicle. One common criterion for stability is the center of mass location with respect to the wheels, which can usually be detected by tongue weight. If the center of mass of the trailer is behind its wheels, therefore having a negative tongue weight, the trailer will likely be unstable. Another parameter which is less commonly a factor is the trailer moment of inertia. Even if the center of mass is forward of the wheels, a trailer with a long load, and thus large moment of inertia, may be unstable.

Question

In the United States, commercial truck classificationis fixed byeach vehicle's gross vehicle weight rating (GVWR). There are 8 commercial truck classes, ranging between 1 and 8.Trucks are also classified in a more broad way by the DOT's Federal Highway Administration (FHWA). The FHWA groups them together, determining classes 1-3 as light duty, 4-6 as medium duty, and 7-8 as heavy duty.The United States Environmental Protection Agency has its own separate system of emission classifications for commercial trucks.Similarly, the United States Census Bureau had assigned classifications of its own in its now-discontinued Vehicle Inventory and Use Survey (TIUS,formerlyknown as the Truck Inventory and Use Survey).

QuestionThe American Association of State Highway and Transportation Officials (AASHTO) is an influential association as an advocate for transportation. Setting important standards, they are responsible for publishing specifications, test protocols, and guidelines. All whichare usedin highway design and construction throughout the United States. Despite its name, the association represents more thansolelyhighways. Alongside highways, they focus on air, rail, water, and public transportation as well.

QuestionThe feature film "Joy Ride" premiered in 2001, portraying the story of two college-age brothers who by a CB radio while taking a road trip.Although the plot seems lighthearted, it takes a quick turn after one of the brothers attempts a prank on an unknown truck driver. They soon find out the dangerous intentions of this killer driver, who is set on getting his revenge. Seven years later in 2008 the sequel "Joy Ride 2: Dead Ahead" came out on DVD only.Similar toits predecessor, the plot involves another murdering truck driver, a.k.a "Rusty Nail". Heessentiallyplays psychological mind games with a young couple on a road trip.

QuestionIn order toload or unloadbotsand other cargo to and from a trailer, trailer winchesare designedfor this purpose. They consist of a ratchet mechanism and cable. The handle on the ratchet mechanism is then turned to tighten or loosen the tension on the winch cable. Trailer winches vary, some are manual while othersare motorized. Trailer winches are mosttypicallyfound on the front of the trailer by towing an A-frame.