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GWINNETT COUNTY TRAFFIC ENGINEERING
TRAFFIC COUNT REPORT 2015
(Published by March 1, 2016)

This report is an alphabetical listing of permanent count stations that are repeatedly counted on an annual basis, using electronic equipment.  
The Gwinnett County Department of Transportation has included all available traffic counts for the last five years (2011 - 2015).  If a particular count location or year is missing, please call us at (770) 822-7400 and we will attempt to include it in our next year’s update (by March 1, 2017).  Please visit our website then for new traffic count information.
Thank you.

Sorted Alphabetically

Please click on the link below to download the Traffic Reports (PDF Format)

All road names starting with A (PDF Format)
All road names starting with B (PDF Format)
All road names starting with C (PDF Format)
All road names starting with D (PDF Format)
All road names starting with E (PDF Format)
All road names starting with F (PDF Format)
All road names starting with G (PDF Format)
All road names starting with H (PDF Format)
All road names starting with I (PDF Format)
All road names starting with J (PDF Format)
All road names starting with K (PDF Format)
All road names starting with L (PDF Format)
All road names starting with M (PDF Format)
All road names starting with N (PDF Format)
All road names starting with O (PDF Format)
All road names starting with P (PDF Format)
All road names starting with R (PDF Format)
All road names starting with S (PDF Format)
All road names starting with T - V (PDF Format)
All road names starting with W - Z (PDF Format)


COLUMN DEFINITIONS
The ROAD ON column is a description of the road name where the count station is found
The "BETWEEN" & "AND" columns list the two cross streets on the main road between which the count station is located
The AGENCY column designates the agency or entity that collected the data: Private Contractor (P)
The DATE COUNTED column shows the actual day on which the traffic counting started.  Traffic counts are conducted for a twenty-four hour period.
The DAY OF WEEK column represents the actual day of the week on which traffic counting started.  If a traffic count was conducted over a period of several consecutive days, letters "AVG" will appear in the column to designate the count as an average for the period.
The EQUIPMENT column represents the equipment used to collect the data: Tube Counter (T)
The NBEB VOL column represents the actual, unadjusted Northbound or Eastbound traffic volume counts
The SBWB VOL column represents the actual, unadjusted Southbound or Westbound traffic volume counts
The PEAK HOUR 'RAW' VOL column lists the highest total number of vehicles counted during any one-hour period during the twenty-four hour collection time

The EST. PEAK HR VOL column contains the estimated average peak hour traffic count for a given count station.  It is calculated by applying the adjustment factors (shown on page c below) according to the methodology used for calculating the EST. ADT explained below.

The D-FACTOR column is the directional factor measured in percent.  It is the percent of the peak hour volume that occurs in the direction of the higher volume traffic flow during the peak hour.  For example, if the peak hour total (the amount for the entire road) is 1000 vehicles and the northbound flow of vehicles during that peak hour is 600, then the D Factor for that section of roadway would be sixty percent; found by dividing 600 by 1000.
The TOTAL 'RAW' VOLUME column represents the actual, unadjusted 24-hour traffic volume counted on a given section of the road
The EST. ADT column contains the average daily traffic (ADT) counts for that station number found by applying the adjustment factors shown on page c below.  To find the "ADT" for a particular count, the unadjusted amount in the "Total 'Raw' Volume" column is multiplied first by the adjustment factor for the month in which the count began. Then the result is multiplied by the adjustment factor for the day of the week on which the count began. The final result is the estimated average daily traffic (EST. ADT).  

MONTHLY ADJUSTMENT FACTORS

JANUARY ------------------      1.11
FEBRUARY ----------------      1.06
MARCH ---------------------     1.06
APRIL -----------------------      0.97
MAY -------------------------      0.96
JUNE ------------------------       0.95
JULY ------------------------        0.97
AUGUST -------------------       0.95
SEPTEMBER --------------      0.97
OCTOBER -----------------      0.96
NOVEMBER --------------      0.98
DECEMBER ---------------      1.01

DAILY ADJUSTMENT FACTORS

SUNDAY -------------------      1.00
MONDAY ------------------      1.01
TUESDAY -----------------       0.99
WEDNESDAY ------------      0.99
THURSDAY ---------------      0.99
FRIDAY --------------------       0.87
SATURDAY ---------------      1.00
AVG. WEEKDAY --------     1.00