Details:

Creators:
Henson, Jamie ; Westrom, Ryan ; Chamberlain, Anna ; Rogers, Jonathan ; Dock, Stephanie ; ... More +
Henson, Jamie ; Westrom, Ryan ; Chamberlain, Anna ; Rogers, Jonathan ; Dock, Stephanie ; Kilim, Giri ; Paradkar, Raj ; Ridgway, Matthew ; Bottigheimer, Nat ; Watten, Mackenzie ; Bakhru, Anjuli ; Ziebarth, Jennifer ; Kao, Michael Less -
Corporate Creators:
CH2M Hill, inc. ; District of Columbia. Dept. of Transportation ; Fehr & Peers
CH2M Hill, inc. ; District of Columbia. Dept. of Transportation ; Fehr & Peers Less -
Subject/TRT Terms:
[+]
Calibration
Evaluation And Assessment
Mixed Use Development
Parking
Spreadsheets
Traffic Congestion
Trip Generation
Urban Areas

Resource Type:
Tech Report
Geographical Coverage:
Washington (District of Columbia) ; United States
Washington (District of Columbia) ; United States Less -
Corporate Publisher:
District of Columbia. Dept. of Transportation
Abstract:
Mixed-use development has become increasingly common across the country, including Washington, D.C.

However, a straightforward and empirically validated method for evaluating the traffic impacts of such

projects is still needed. The data presented in the Institute of Traffic Engineers (ITE) Trip Generation

informational report is primarily collected at suburban, single-use, and free-standing sites. This defining

characteristic limits the applicability of these basic trip rates to mixed-use or multi-use development

projects. While the number of person trips generated by individual uses may be similar to free-standing

sites, the potential for interaction among on-site activities can significantly reduce the total number of

vehicle trips. Additionally, mixed-use projects located in areas with a variety of nearby destinations and

high quality transit access will produce fewer vehicle trips due to a larger share of trips entering and

exiting the site on foot, bicycle, or by transit.

The Mixed-Use Development (MXD+) method, initially developed for the United States Environmental

Protection Agency (EPA) and ITE, accounts for the degree to which mixed-use sites internally capture

travel and the extent to which smart growth site design and context result in walking, biking, and transit

use. The EPA MXD+ method represents a dramatic improvement over current methods of estimating trip

generation for mixed-use developments. The method produces reliable, though still somewhat

conservative, estimates of trip generation that are highly sensitive to the context of any given

development.

The District of Columbia Department of Transportation (DDOT) has long recognized the deficiencies with

traditional approaches and has conducted a number of studies to better understand traffic and parking

generation characteristics of the highly urban District. These methods, while significantly better than

using national data, still lack sufficient sensitivity to the context of developments (that is, where it would

be placed and what would surround it).

This study applies the EPA MXD+ method to sites within The District. Based on those initial results, the

EPA MXD+ method is then calibrated to better match District conditions. The resulting DDOT MXD+ method is then operationalized into an easy to use spreadsheet tool for use by DDOT staff in project

development review.


Format:
PDF
Collection(s):
US Transportation Collection
Main Document Checksum:
[+]
urn:sha256:deee702ccfba29bce8b63959c0875bb4ba40c3fde3158eb959cc9d6822c41b27
File Type:

Supporting Files

• No Additional Files

More +