Travel time charts I-20/I-285 CD lanes successes
10/11/2013, 6 a.m.
Three months after they opened to motorists, the I-20/I-285 collector-distributor lanes in south DeKalb County have reduced rush-hour backups 56 percent to 195 percent.
The Georgia Department of Transportation said the lanes, built at a cost of $31 million, are delivering huge “bang for the buck.”
The lanes, which took 40 months to construct, opened to traffic on June 26.
Russell McMurry, GDOT’s chief engineer, said they are seeing great benefits in time savings and improved mobility through the I-285/I-20 interchange.
“We expected improvement, but the actual numbers go way beyond our expectations,” he said. “During rush hour, travel in the new eastbound CD lanes from Columbia Drive to east of Panola Road has been reduced from 18.3 minutes to only 6.2 minutes – a 195 percent improvement.”
McMurry says a travel-time saving of 10 minutes or more is very significant and meaningful for everyone.
The 4.5-mile project, stretching from the I-20/I-285 interchange east to Panola Road, uses use a 1.2-mile barricade to separate merging traffic from I-285 and through traffic on I-20 eastbound.
It also doubled the number of lanes exiting at Wesley Chapel Road.
GDOT board member Robert Brown called the improvements “off the charts.”
“We hoped we might see improvement in excess of 56 percent, but 195 percent is off the charts,” he said.
Brown, who drives the corridor almost daily and sees the improvement firsthand, said he is extremely pleased that GDOT and DeKalb County worked together and were innovative in incorporating a Design-Build approach.
“They have expeditiously brought a much higher level of mobility to a very congested corridor,” he said.