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Ken Roberts - - Bicycling calculations of steepness for hill climbswhat's here: see also
and more . . .
I calculated steepness and size for some hill climbs on New Jersey roads -- mostly hills which people suggested to me, others which I found myself. purposeI made these calculations with two goals: (1) So event organizers and route planners could avoid using roads which are unsuitable for their riders. shortcut for those who don't want to figure out the numbers: If a section of road with a hill-climb is in the table below, then it's not suitable for most riders. (2) So that very experienced + athletic bicycle climbers who understand steepness numbers could use those as one part of their criteria for selecting climbs which are suitable for their current level of challenge or training. Riding down hills is not one of the purposes of these calculations. warning: Riding down a hill on a bicycle is usually much more dangerous than riding up it. Riding down hills as steep as the ones on this page has special risks and dangers beyond most bicycling on the roads, with consequences of serious injury or death, requires special judgment and skills to handle those risks. Most of the key aspects of the risks of riding down a hill are not represented or addressed by the numbers and descriptions on this page. Do not climb up a steep hill unless you have a plan for how to get back down again safely. I recommend that most riders avoid the extra risks of riding steep down by: (a) finding other roads which are less steep to go down; or (b) put the riders and their bikes into a motor vehicle to take them down; or (c) walk down the steeper sections. Before getting into the details, here's some . . . key findingsthe Kings:
the Biggest:
longest steep sections:
tough "gangs" of climbs:
event: Hillier Than Thou Closer hills: A problem in NJ is that 80% of the 25 steepest climbs are nowhere near where most New Jersey road cyclists live. So here's some that might be nearer:
nasty neighbors nearby:
see also map of NJ hill areas | details on selected NJ climbs | Hudson Valley NY climbs | Hillier Than Hillier sequence |
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calculations for the hillsI calculated steepness and size for some hills on New Jersey roads. There's some trickiness and inaccuracy in doing these calculations, and I'm confident there's some significant inaccuracies in this list . . . anyway below are my results so far as of October 2008 for the 20-30 steepest hills in NJ: for lots more steep climbs, see lists by county, or by mountain area, or all in one list.
Warning: Some of these climbs often have high motor vehicle traffic through a bad visibility section, others have damaged surface or other dangerous conditions. The table above is only an estimate of size and steepness of each hill, not a recommendation to attempt climbing or descending it. info columnscty = county grade = vertical climb divided by horizontal distance, as a percentage ntrst = "interesting riding" on a scale of 1 - 5: curves, variations in steepness, views. notes? = traffic, visibility, and surface characteristics unknown to me. H = higher traffic volume than many other climbs. V = questionable visibility or limited sight distance. last checkedb = steepness grade with multiple runs with GPS with barometric altimeter. see also map of NJ hill areas | details on selected NJ climbs | Hudson Valley NY climbs | Hillier Than Hillier sequence more . . .accuracy of steepness calculationsMeasuring or calculating the steepness grade of a steep curvy road is actually rather tricky. Most methods which people use a lot are not very accurate (e.g. topo software, GPS) for steep curvy roads with variations in steepness. Or sometimes they're accurate and sometimes they're not, and it's hard to tell when. Here's a much too detailed discussion of the trickiness. Some other hill-climb websites show steepness grade numbers to a tenth of a percent. Really it takes lots of time and careful procedure to achieve anything like that level of accuracy. Bicyclists and car and truck drivers have no real need for that accuracy and it's no way worth the work to achieve it. The more I've tried to achieve greater accuracy, the more I find out how hard it is and what a waste of time. Therefore . . . The tables here give steepness as a range of numbers, or as an integer number of grade percent. I will not support the illusion of steepness accurate to a tenth of a percent. If you want to know who steep some hill really is, get out and ride it. see also
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