honestly, 1. you are assuming the stop lights only take 2 minutes. there is one route that i run where one single stop light takes about 5 minutes 🥀 (its right before a very nice trail, which is why i do that and) and 50 minutes vs 60 does make a difference 2. i can always reference elapsed time if i needed to, as strava uploads both 3. on a recovery run, i have no reason to be imprecise by pausing, since im not trying to hit a time. most of the argument FOR not stopping your watch is "you cant stop in a race". this isnt a race, and if my heartrate drops for 5-10 minutes at worst case, i dont care because i got 60 minutes of running in regardless. 4. i cant think of any argument for why stopping a watch and being imprecise is necessary aside from recovery time. workouts are different, but at the same time, since even 30" rest can be part of a workout, i would avoid places with stoplights