I lost over a ¼ of a mile on my last run onWatch because of this. It is hard to Force Touch and then Tap Resume while looking for traffic, crossing a street and being fatigued. Hope Apple adds auto pause soon.
Easy fix! Don't stop!
I hate stopping for traffic/lights so if i get to a junction and can't cross to carry straight on because of cars either turn left or right and continue running down the side road then cross when its clear and come back on myself and continue going straight or if its a dodgy road and should really cross at the junction then i run down the road a bit and run back, keep doing that until the lights change.