Design Guidance for Intersection Auxiliary Lanes (2014) / Chapter Skim
Currently Skimming:
Pages 1-4
The Chapter Skim interface presents what we've algorithmically identified as the most significant single chunk of text within every page in the chapter.
Select key terms on the right to highlight them within pages of the chapter.
From page 1... ...
1 S U M M A R Y Design Guidance for Intersection Auxiliary Lanes Crashes at intersections constitute a large portion of the annual traffic crashes in the United States. Previous experience has shown that auxiliary turn lanes are an effective countermeasure to address some of these crashes, and they are documented as having sizable crash modification factors in the AASHTO Highway Safety Manual.
|
From page 2... ...
2• Guidance on how to adjust the key design dimensions of a double leftturn lane is widely varied, if available. The adjustments for storage, deceleration, and taper of a double left turn lane are often determined qualitatively or on a casebycase basis.
|
From page 3... ...
3 a key component of the study design is not represented. The recommended method to determine saturation flow rate requires the elimination of a queue if a heavy vehicle is present within the queue.
|
From page 4... ...
4• A design that accommodates decelerating at 4.2 ft/s2 during the lateral movement into the turning lane provides for a more gradual, controlled deceleration, but a higher decel eration rate (closer to 6.5 ft/s2 for half of the observed drivers or 10 ft/s2 for the most aggressive drivers) could be acceptable if site constraints or other factors dictate a shorter length.
|
Key Terms
This material may be derived from roughly machine-read images, and so is provided only to facilitate research.
More
information on Chapter Skim is available.