Item 8 - Traffic Threshold WorksheetTraffic Impact Analysis
Title of Plan
THRESHOLD WORKSHEET
Case Number
Driveway Ordinance No. 634 requires that a Traffic Impact Analysis (TIA) be submitted with development applications (zoning,
concept plan, site plan, etc.) if the proposed development exceeds one or more of the three threshold criteria listed below. No
development applications will be accepted unless accompanied by a TIA. For those projects that do not exceed any of the
three criteria, a TIA Threshold Worksheet must be submitted and approved by the City Engineer in lieu of the required TIA prior
to submittal of the development application. Please describe in detail your evaluation of each criteria listed below. Additional
sheets may be attached if necessary.
Criteria #1:The development exceeds parking 100 spaces average per driveway.
Criteria #2:Any driveway in the development is projected to serve 1000 or more vehicles per day.*
Criteria #3:Any driveway in the development is projected to serve 100 ingress vehicles or more in the design hour.*
*Unless approved otherwise, trip generation rates should be based on the most recent edition of the Institute of Transportation
Engineers (ITE) Trip Generation Manual.
I hereby certify that this project does not exceed any of the three threshold criteria shown above and therefore the development
would not warrant a TIA in accordance with Section 3.4 of the Driveway Ordinance No. 634 of the City of Southlake.
Name Registration No. Date
Firm Phone Fax
For City Use Only: The requirement for a Traffic Impact Analysis with this submittal is hereby waived:
Name:
Title:
Date:
Carroll Crossing (Office and Residential Development Plan)
Office (19,652 SF off.; 3,860 SF med office): 13.85 VTPD/1000SF * 23,512 SF = 325 VTPD
Restaurant: 469.4 VTPD/1000SF * 3.375 SF = 1,584 VTPD
1,584 VTPD = 1,307 VTPD for 3 driveways = 436 VTPD/Driveway
Residential: 9.43 VTPD/LOT x 21 LOTS = 198 VTPD (198 VTPD for 2 ROADS)
TOTAL: 2,108 VTPD for 3 Drives (est. less than 1,000 for any condition.)
DeOtte, Inc.; Firm No. F-3116 817-946-6088 N/A
Richard W. DeOtte, P.E.TX 74232 March 7, 2025
Total AM Peak ingress = 230 vehicles (office 154; rest. 51, residential 25)for 3 driveways/roadways) <100 / drive
Total PM Peak Ingress = 194 vehicles (office 81; rest. 50, residential 63)for 3 driveways/roadways) <100 / drive
Office and Restaurant: 137 Spaces/2 driveways = 69 spaces per driveway.
Residential: N/A
ZA25-XXXX