1. See how to calculate the slope and its applications
2. How to calculate the road slope?
http://www.alke.com/electric-vans-calculate-slope.html
3. Why should you calculate the slope?
http://serc.carleton.edu/mathyouneed/slope/slopes.html
4. Slope percent and slope angle
http://www.firefightermath.org/index.php?option=com_content&view=article&id=40&Itemid=54
5. the slope of a road
http://www.1728.org/gradient.htm
6. Do you know that San Francisco is one of the cities with the steepest streets in the world?
Learn more here:
http://www.datapointed.net/2009/11/the-steeps-of-san-francisco/
7. How to determine or calculate roof pitch or roof slope
http://roofgenius.com/roofpitch.htm
8. ARCHITECTURAL DESIGN CONSIDERATIONS
http://www.un.org/esa/socdev/enable/designm/AD2-01.htm
9. Wheelchair Ramp Information
http://www.brainline.org/content/2008/07/wheelchair-ramp-information.html
10. Wheelchair ramp slope
http://www.wheelchairrampguide.org/wheelchair-ramp-slope.html