The five steps in the analysis were:
- Identification of study population through extraction of relevant commercial truck data during all weekdays of the year 2017 at 300 specific locations using an extensive truck GPS database;
- Application of data quality tools and techniques;
- Application of a four-step analysis process that utilizes vehicle time, date and speed information;
- Calculation of total freight congestion values and ranking (congestion index); and
- Production of detailed congestion profiles for the 100 top ranked locations.
ATRI’s analysis found that year-over-year truck speeds across the top 10 locations dropped by an average of nearly 9 percent as congestion worsened along the nation’s busiest freight roadways, according to the company’s statement.
Although Spaghetti Junction fell a spot in the ranking, two metro Atlanta locations rose. The intersection of I-75 and I-285 (north) rose a spot, from No. 4 last year to No. 3. And the area where I-20 intersects with I-285 (west) rose from No. 17 last year to crack the top 10, finishing No. 9 this year.
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I-285 at I-85 (north)
National rank: 2
Average speed: 34.8
Average speed during peak times: 22.9
Nonpeak average speed: 40.6
Peak average speed percent change: -7.35 percent
I-75 at I-285 (north)
National rank: 3
Average speed: 37.9
Average speed during peak times: 27.4
Nonpeak average speed: 42.8
Peak average speed percent change: -9.91 percent
I-20 at I-285 (west)
National rank: 9
Average speed: 44.5
Average speed during peak times: 38.3
Nonpeak average speed: 47
Peak average speed percent change: -5.06 percent
Those three aren’t the only bottlenecks Atlanta can claim, however.
The interchange of I-20 at I-285 on the east side ranked No. 25; I-20 at I-75/I-85 (the Connector) was No. 54; and the I-75/I-85 intersection was No. 91 out of 100.
ATRI doesn’t factor in tractor-trailer accidents at these locations.
Just this week, a truck hauling frozen broccoli overturned on the ramp from I-285 to I-75 south of Atlanta, shutting down the ramp.
A 2015 Bloomberg Business study of ATRI data found that more than 200 trucks flipped in the Atlanta area from 2001 to 2015. And more than 200 people died in truck rollovers in Georgia during that time.
The only city to have more freight bottlenecks than Atlanta was Houston, which had nine.
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