Here are the past two years. This is only a true 4 road games in 5 weeks (ignored 4 out of 5 road games with a bye week thrown in, i.e. 5 games in 6 weeks):
2012 - 7 times
Houston wks 10-14: 4-1 (WWWWL)
San Francisco wks 12-16: 3-2 (WLWWL)
Minnesota wks 12-16: 3-2 (LLWWW)
Green Bay wks 3-7: 3-2 (LWLWW)
Detroit wks 6-10: 3-2 (WLWWL)
Dallas wks 6-10: 2-3 (LWLLW)
Seattle wks 4-8: 2-3 (LWWLL)
2013 - 7 times
Seattle wks 4-8: 4-1 (WLWWW)
Cincinnati wks 6-10: 3-2 (WWWLL)
Detroit wks 2-5: 3-2 (LWWLW)
Oakland wks 10-14: 1-4 (LWLLL)
Jacksonville wks 2-5: 0-5 (LLLLL)
New Orleans wks 12-16: 2-2 (WLWL?)
Chicago wks 12-16: 2-2 (LLWW?)