State Route 6 Corridor Study Final Report - Cobb County Government

SR 61, in turn, has negative impacts on SR 6. A majority of the crashes at this
intersection are rear‐end type collisions (83 percent), followed by angle type crashes
(seven percent). SR 61 is planned to be widened to four lanes in 2009. Responding to
the unique situation at this intersection, the following improvements are recommended:
• Ensure the proposed roadway and bridge widening on SR 61 accommodates left
turns onto Windale Road with an exclusive left turn lane.
• Install a roundabout at the intersection of SR 61 and Windale Road to reduce
congestion along SR 61, should the proposed SR 61 project not be constructed in
2009.
• Build a road connecting Hay Renfroe Drive to Sub Station Road. This will
provide continuous access between SR 6 and SR 61.
• Install a traffic signal at the nearby intersection of SR 6 and Old Harris Road to
relieve congestion.
� Provide operational improvements at intersection of SR 6 at US 78/278
The intersection of SR 6 at US 78/278 was identified for field review due to a higher
frequency of crashes. SR 6 at US 78/278 is a four‐leg signalized intersection with
protected‐only left turn phases on all approaches. There is an active project to install a
red light running photo enforcement system at this intersection. The crash data
revealed that a majority of the crashes at this intersection were rear‐end type collisions
(57 percent), followed by angle type crashes (14 percent). The following operational
improvements are recommended for this location:
• Remove redundant directional signage at the intersection, particularly on
westbound US 78/278.
• Move overhead lane assignment signs to remove visual obstruction to traffic
signal and provide notification of lane assignment earlier.
• Change the right turn only lane on westbound US 78/278 to a shared
through/right lane. This lane ends about 400 feet west of SR 6.
� Provide operational improvements at intersection of SR 6 at Maxham Road
The intersection of SR 6 at Maxham Road was identified for field review due to a higher
frequency of crashes. SR 6 at Maxham Road is a four‐leg signalized intersection with
protected‐only left turn phases on all approaches. There is a planned project to install a
median on the east side of this intersection approaching Maxham Road. The project
will also include signal and pedestrian upgrades. The crash data revealed that a
Final Report 3‐21
January 2008