Alternative Intersections and Interchanges (A.I.I.s) are designs that improve operations and safety for motorized traffic by strategically adjusting the geometric features at a given location, working on the general principle of redistributing motor vehicle demand at an intersection in an attempt to limit the need to add capacity with new lanes to improve traffic flow.
The TRB National Cooperative Highway Research Program's NCHRP Research Report 948: Guide for Pedestrian and Bicyclist Safety at Alternative and Other Intersections and Interchanges provides specific guidance for four common A.I.I.s: Diverging Diamond Interchange (DDI), Restricted Crossing U-Turn (RCUT), Median U-Turn (MUT), and Displaced Left-Turn (DLT).
These designs may involve reversing traffic lanes from their traditional directions, which may introduce confusion and create safety issues for pedestrians and bicyclists. In addition, pedestrian paths and bicycle facilities may cross through islands or take different routes than expected. These new designs are likely to require additional information for drivers, bicyclists, and pedestrians as well as better accommodations for pedestrians and bicyclists, including pedestrians with disabilities.
Table of Contents |
skim chapter | |
|---|---|---|
| Front Matter | i-viii | |
| Chapter 1 - Introduction | 1-10 | |
| Chapter 2 - Pedestrians | 11-26 | |
| Chapter 3 - Bicycles | 27-42 | |
| Chapter 4 - Assessment | 43-92 | |
| Chapter 5 - Generalized Design Treatments | 93-116 | |
| Chapter 6 - Median U-Turn (MUT) Intersections | 117-136 | |
| Chapter 7 - Restricted Crossing U-Turn (RCUT) Intersections | 137-160 | |
| Chapter 8 - Displaced Left-Turn (DLT) Intersections | 161-186 | |
| Chapter 9 - Diverging Diamond Interchanges (DDIs) | 187-212 | |
The National Academies Press and the Transportation Research Board have partnered with Copyright Clearance Center to offer a variety of options for reusing our content. You may request permission to:
For most Academic and Educational uses no royalties will be charged although you are required to obtain a license and comply with the license terms and conditions.
For information on how to request permission to translate our work and for any other rights related query please click here.
For questions about using the Copyright.com service, please contact:
Copyright Clearance Center
22 Rosewood Drive
Danvers, MA 01923
Tel (toll free): 855/239-3415 (select option 1)
E-mail: info@copyright.com
Web: https://www.copyright.com
Loading stats for Guide for Pedestrian and Bicyclist Safety at Alternative and Other Intersections and Interchanges...
Finding similar items...
