Trail Types And Use Trail Construction Trails On Slopes

Trail use has become very popular for a wide variety of users. Some trails are designated as nature trails, and are used by people learning about the natural world. Many trails are designated day trails, meaning that they are generally used by people out for a short hike, less than a day. Some trails are designated backpacking trails, or long-distance trails, and are used by both day hikers and by backpackers. Some of the trails are over a thousand miles long and may be hiked in sections by backpackers, or completed in one trip by dedicated hikers. Some trails are specifically used by other outdoor enthusiasts to gain access to another feature, such as good climbing sites. Many runners also favor running on trails rather than pavement, as giving a more vigorous workout and better developing agility skills, as well as providing a more pleasant exercise environment.

Recent decades have seen an explosion of interest in bicycling, both street-type and off-road type. Many graded, surfaced bike paths have been built, but especially popular is the off-road, or mountain biking. These trails must be built to a different set of standards than foot trails, requiring more stable, harder surfaces, less strenuous slopes, and less sharp changes in direction. A particular offshoot of trail biking is downhilling, which can be extremely environmentally destructive if not well-managed.

Horseback riding has continued to be a popular activity for many trail users. Again, horse trails must be built to different standards than other trails.

Motorized trail use also remains very popular with some people. Such terms as ORV, four-wheeling, all-terrain vehicle, and others actually have highly specific meanings. In the United States, this group of people have a very strong political lobby. The Recreational Trail Program defined as part of the Intermodal Surface Transportation Efficiency Act (ISTEA, pronounced "ice tea") of 1991 mandates that seventy percent of its funding be used for motorized trails, with the remaining thirty percent used for dedicated foot trails.

Another type of trail that was quite popular in the 1970s and 1980s but is less popular today is the exercise trail , which combines running with exercise stations.

2 Trail construction

While many trails have arisen through common usage, quality trail design and construction is a complex process requiring certain sets of skills.

When a trail passes across a flat area that is not wet, often all that is required is to clear brush, tree limbs and undergrowth to produce a clear, walkable trail. When crossing streams, bridgeThis article is about the edifice. For other meanings, see Bridge (disambiguation). suspended deck compression arch bridges A bridge is a structure built to span a gorge, valley, road, railroad track, river or other body of water, or any other physical obs may or may not be desirable, depending on the size of the stream and the depth of its banks. In wet areas, it may be necessary to create an elevated trailway with fill or by building a boardwalkA boardwalk is a place, most typically in beachfront communities, where a path for pedestrians and sometimes vehicles runs along a beach or overlooking and close to a beach. There are boardwalks in many places in the world; however, they are extremely com. One problem with boardwalks is that they require frequent maintenance and replacement - boards in poor condition are often slippery and hazardous.

2.1 Trails on slopes

A common mistake in establishing trails is to make them on slopes that are too steep for comfort and the environment. Such steep trails generally result in serious erosion, a wide swath of impacted area as walkers go to the sides to find better footing, and the inability of many hikers to walk the trail. An absolute limit for trail grades is a slopeIn mathematics, the slope (or gradient especially where three or more dimensions are discussed) of a straight line (within a Cartesian coordinate system) is a measure for the "steepness" of said line. This pages focuses on such slopes. With an understandi of one in six, and a more practical limit is a slope of one in eight. Trails that ascend steep slopes may use switchbackA nearly 180-degree turn in a road, trail, or ramp is called a hairpin turn (also hairpin bend or, if in a trail, a switchback . It is named for its geometric resemblance to a hairpin. These turns are often built when a route climbs up or down a steep slos (also called hairpins), but switchback design and construction is a specialized topic that takes great care. The best trail designs eliminate switchbacks.

If a trail is being made to be accessible to off- roadThis page is related to transport you may be looking for the 2002 Bollywood movie Road''. A road is a strip of land, smoothed or otherwise prepared to allow easier travel, connecting two or more destinations. In the context of railways, a road is a single wheelchairA wheelchair is a device used for mobility by people for whom walking is difficult or impossible, due to illness or disability. It typically consists of a seat supported on two large wheels on an axle attached towards the back of the seat and two small whs, the slope should be no more than one in ten. If a paved trail has to be accessible to all wheelchairs, the slope must be no more than one in twelve, with periodic level pulloffs.

The off-slope, or side-slope, of the trail also must be considered. This is the slope of the trail from side to side, and should never be more than one in twelve. Side-sloped trails are prone to gullyA gully is a geological feature that is created by running water such that it forms a deep ditch. Such features are usually small, on the order of meters to tens of meters. In the sport of cricket, gully is a fielding position. Gully (chess) is a chess ening. Ideally, the treadway of the trail should be almost, but not quite, level in cross-section.

Achieving the proper slope in hilly terrain usually requires the excavation of sidehill trail. This is trailway that is constructed by establishing a line of suitable slope across a hillside, then digging out by means of a mattock or similar tool to create the trail. This may be a full-bench trail, where the treadway is only on the firm ground surface after the overlying soil is removed and thrown to the side as waste, or a half-bench trail, where soil is removed and packed to the side so that the treadway is half on firm old ground and half on new packed fill. In problem areas, it may be necessary to establish the trail entirely on fill. In cases where filling is used, it's necessary to pack it firmly and to revisit the site periodically to add to the fill and repack it until fully stable.

2.2 Drainage

An important and often-overlooked factor in trail construction is that of drainage. Where a trail is near the top of a hill or ridge, this is usually a minor issue, but when it is farther down it can become a very major issue. Trails, by their nature, tend to become drainage channels and eventually gullies if the drainage is not properly controlled.

In areas of heavy water flow along a trail, it may be necessary to create a ditch on the uphill side of the trail with drainage points across the trail. The cross-drainage may be accomplished by means of culverts, which must be cleared on a semi-annual basis, or by means of cross-channels, often created by placing logs or timbers across the trail in a downhill direction, called "thank-you-marms", "deadmen", or waterbars. Using timbers or rocks for this purpose also creates erosion barriers. Rock paving in the bottom of these channels and in the trailside ditches may help to maintain stability of these. Ideally, waterbars should be created, with or without ditching, at the most major points of water flow on or along the trail, and in conjunction, if possible, with existing drainage channels below the trail. Another important technique is to create coweeta dips, which are dips in the trail grade so that the hiker, ascending the trail, is hiking uphill, then slightly downhill for a few feet, then uphill again. These provide positive drainage points that are almost never clogged by debris.

2.3 Multi-use trails

Trails intended for use by bicycles, wheelchairs and pedestrians will often be surfaced, especially in heavily-used or urban areas. This can be asphaltAsphalt is a highly viscous liquid that occurs naturally in most crude petroleums. Asphalt can be separated from the other components in crude oil (such as naphtha, gasoline and diesel) by the process of fractional distillation, usually under vacuum condi paving, or compressed stone dust . Such trails will also have well-built bridges with a supported deck and side rails.

There has been a major effort to convert abandoned railroad grades to bike paths or multi-use paths. This has been termed " rails-to-trails".

2.4 Signage

For long-distance trails, or trails where there is any possibility of anyone taking a wrong turn, blazing or signage should be provided. This may be accomplished by using either paint on natural surfaces or by placing pre-made medallions. Generally speaking, every trail should have a distinctive blaze, of a particular color and shape. Horseshoe-shaped blazes are good for bridle trails (but be sure to have the "u" of the horseshoe opening to the top, or you'll offend some riders!). The Appalachian Trail is blazed with white rectangles. Blue is often used for side trails.

When using paint on trees, the preferred technique is to use a drawknife to smooth the outer bark of trees without penetrating to the inner bark (so as to not injure the tree), then using an oil-based paint to create the blaze. Stencils are often useful, and sash brushes are the preferred brush type for precise work. Oil-based paint seems to last longer than latex-based and seems to be more benign to the bark. Blazes may also be painted on obvious rock surfaces or on posts set into the ground (or on utility poles, fences, or other handy surfaces).

2.5 Trail maintenance

A very common and major error in building trails is assuming that once a trail is built, it needs no further work. Nothing could be further from the truth. Not only does a trail need annual clearing work to remove vegetation, fallen wood and other obstacles, but often needs minor or major regrading work from year to year, and often drainage improvements and erosion control, not to mention marking and signage.

3 Trail in the broader sense

The term "trail" has also been used by developers and urban planners for a variety of modern paved roads, highways, and boulevards. The most bizarre use of the term is in the province of Alberta in Canada, which has multi- lane freeways called "trails."

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1 Trail types and use