For timed intervals, look at a watch, or you can time the distance between landmarks, like phone poles, and use those as your markers. (health.com)
You'd probably have to have a survey to tell, you can't just atke half way between houses or look at phone poles or utility lines. (biggerpockets.com)
Finally, you have to get a National Grid truck back out to your neighborhood to go back up the phone pole and turn the power on again. (nystateofpolitics.com)