Traffic Impact Analyses or Studies

The Congestion Management Section of the North Carolina Department of Transportation has developed the Analysis Guidelines linked below. The intent of these guidelines is to identify standard procedures and inputs for analysis to provide a smoother review and approval process for Traffic Impact Studies. By using these standards, justification of reports and assumptions will be simplified. These standards are not intended to replace engineering judgement. Deviations from these standards would still be allowed, however justification for differences would be required. Deviations without justification or explanations will result in reports being sent back without review and approval. NCDOT TIA Analysis Guidelines Current Edition 2005-10-01 revised 2006-02-15

TIP Project Traffic Analyses

The values and information below serve as standard practices and default input values for traffic impact analysis reports as they relate to TIP. Projects. Changes or deviations from these standards are allowed, but should be justified and documented. Failure to properly justify and document changes and deviations may result in the analysis being returned for changes, corrections and justification without a detailed review and the additional analysis will be performed at the consultant’s expense. A meeting regarding a scope of study is encouraged where significant deviations from standard practice are anticipated. They are also encouraged before scope is agreed to when contracting with other Branches of the Department. NCDOT TIP Project Analysis Guidelines Current Edition 2005-10-01 revised 2006-02-15

Driveway Permit Review

NCDOT Congestion Management Driveway Permit Review General Comments Current Edition 2008-04-01

"Rate vs. Equation" Spreadsheet

The "Rate versus Equation" spreadsheet provides specific trip generation recommendations per land use including pass-by percentage data and when to use trip generation equations, rates, or local data. Trip Generation Rate/Equation Recommendations

NCDOT Volume Breakout Spreadsheets

AADT breakout spreadsheet for two-way AADT to Peak Hour Volumes AADT breakout spreadsheet for one-way AADT to Peak Hour Volumes Spreadsheet to assist in the interpolation of traffic volumes

NCDOT Alternative Intersection Count Converter

This spreadsheet will convert a "standard" intersection traffic volume layout to layouts for alternative intersection designs. This spreadsheet will facilitate entering volumes for analysis. The "Rate versus Equation" spreadsheet provides specific trip generation recommendations per land use including pass-by percentage data and when to use trip generation equations, rates, or local data. Intersection Count Converter (revised 2006-04-13)

North Carolina Median Crossover Guidelines Current Edition 2004-01-01
Policy on Street and Driveway Access to North Carolina Highways Current Edition July 2003
ITS and Signals Unit - Design Manual Current Edition July 2003
Right-of-Way Disposal and Control of Access Review Committee Operating Procedures and Checklist - Revised 2006-01-26  (For more information, contact Thomas Terry, Highway Design Branch, 919-250-4001)

RW Disposal and CA Procedures

RW Disposal and CA Checklist