IEM Daily Feature
Monday, 22 September 2014

Equinox and Driving

Posted: 22 Sep 2014 05:44 AM

The fall equinox is today, which means the entire globe gets roughly 12 hours of daylight. This is also a time of year that there are concerns about driving during sunrise and sunset. The reason being the azimuth at which the sun rises and sets is due east and west. This happens to be a main orientation of many roads in the state as shown by the featured chart. The chart shows an analysis of road orientation as computed by taking each of the road segments in a GIS coverage of roads and then computing their respective orientations. Each segment is weighted by its length to produce the chart. Being a flat state certainly allows a vast majority of the roads to be oriented N-S and E-W.

Good = 13
Bad = 7
Abstain = 5

Tags:   equinox   roads