Commuting when the kids are older
	
	
		I would like to start commuting again but need a sounding board.  Kids are 10 and 14 now, able to peacefully hang out on their own for reasonable periods of time.  DH still works a 2nd, I work "day" which gets me home by 4 - 4:30.  We keep the schedule as it allows him to be there summers, days off school.  He leaves 2:30pm.  
My question is what other commuting Moms do. Leaving kids by themselves for short periods is no prob.  But with a car I can get to them "quickly" should something happen.  With a bike not so quickly.  I don't want to live in fear.  If something "major" went wrong they would know to call 911.  We live in a pretty tight neighborhood, we know everyone and kids can reach out to them if necessary (policeman on one side, detective across, good people in other spots).  
Am I over thinking this?  My commute is only 7 miles one way, part of which is a path beside Route 95, the rest weaving through typical hilly New England coastal neighborhoods.  I'd allow 45 mins for the commute to start, car is 20-25 on the way home.
Your opinions welcome!
Linda