Hello, I have one issue: I would like to know how much time will it take a pedestrian to walk certain distance (based on its movement speed), but taken into account the slope that his walking path takes? I checked a number of sources and most of them quote the speed of an adult, healthy, pedestrian (I assume an average of male and female values) to be: 1.4 meters/second. Which is 84 meters/minute or around 275 feet/minute. However, can it be that this 1.4m/s is actually the value in case the pedestrian is walking on a relatively flat terrain? What happens he is walking on a sloped terrain, of a certain angle!! For example, a pedestrian is walking on a terrain which has a constant slope angle of 20 degrees. How does those 20 degrees reduce the 1.4 meters/second walking speed? I would be grateful for any kind of reply. Thank you in advance!