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A trailhead signage that shows the grade of a walking path at a park in Sydney, Australia. A trail difficulty rating system , also known as walking track grading system , walk gradings or trail grades , is a classification system for trails or walking paths based on their relative technical and physical difficulty. [ 1 ]
Naismith's rule helps with the planning of a walking or hiking expedition by calculating how long it will take to travel the intended route, including any extra time taken when walking uphill. This rule of thumb was devised by William W. Naismith, a Scottish mountaineer, in 1892. [1] [3] [4] A modern version can be formulated as follows:
Peak B-grades are roughly one level easier than V-grades (e.g. V8 was equivalent to B9). The V-grade / Font-grade systems (sometimes the "technical grade" component of the British E-grade system is used) have replaced Peak B-grades in Britain but they appear in some guidebooks and some boulder grade conversion tables. [3] [10] [19]
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The pavement condition index (PCI) is a numerical index between 0 and 100, which is used to indicate the general condition of a pavement section.The PCI is widely used in transportation civil engineering [1] and asset management, and many municipalities use it to measure the performance of their road infrastructure and their levels of service. [2]
There are 14 global core medicines that enable international comparisons, 16 regional core medicines that enable regional comparisons, and 20 supplementary medicines that are locally important. When comparing prices, one dosage form and strength is specified for each medicine. To calculate affordability, a typical treatment schedule is specified.
The William Hill Handicap Hurdle is a Premier Handicap National Hunt handicap hurdle race in England which is open to horses aged four years or older. It is run at Aintree over a distance of about 2 miles and 4 furlongs (4,023 metres), and it is scheduled to take place each year in April.