Nearly all of us are pedestrians over the course of our daily activities and have seen or encountered close calls over the years. Any break in the weather has folks with mid-winter cabin fever clambering to get outdoors-maybe a brisk walk or jog?
The traditional holiday season has passed on by, and we find ourselves in the midst of the months that bring us short, winter days. Hello to all of our safety-focused friends! Welcome to the winter edition of the Safety Compass. Visit the FHWA Office of Safety at Booth 721 in the TRB Exhibit Hall! A Message from the FHWA Associate Administrator for Safety, Cheryl Walker Prioritizing Pedestrian Safety NDS Pooled Fund Is Sponsoring New ResearchĬognitive Considerations in the Classroom IHSDM Update: Release 15.0.0 Now Available! Teaching Pedestrian and Bicycle Concepts to the Next Generation of Transportation Leaders Systemic Safety Improvements on Rural Roadways on the Lake Transverse ReservationĪgencies Are Inspired to Action During Pedestrian Safety Peer Exchanges NTSB Determines Cause of FIU Pedestrian Bridge Collapse, Issues New Recommendations for Bridge Structures Low-Cost Safety Countermeasures: Small Changes Make a Big Difference on Rural Roads Roadway Safety Data Capabilities Assessment Final Report SHSP Evaluation - It Does Make a Difference! Third Edition of the Highway-Rail Crossing Handbook Now Online!Ī Second "Go-Around" for the National Roundabouts Week CampaignĬrash Trees: A Useful (and Now Automated) Tool for Systemic Safety Analysis
The 2019 Roadway Safety Awards - Recognizing Road Safety Projects That Are Making a Difference
#Aashto 1993 flexible pavement design software new jersey pdf
To view PDF files, you can use the Acrobat® Reader®.Ī Message from the FHWA Associate Administrator for Safety, Cheryl Walker Subscribe Today! A Publication of the Federal Highway Administration Office of Safety Winter 2020: Volume 14 Issue 1 RY) $$$$$ Overall Standard De 05 8 Estimated Total 18-kip ESAL Application W miliom Effective Readed Soul Resilient Modulus, M.Sign up to have Safety Compass delivered right to your inbox! The M, for subgrade material is 3,000 lb/in? The reliability level is 90%, the standard deviation 0.5, the initial serviceability index is 4.5 and the terminal serviceability index is 2.5 for the highway, Table 4.5 Structural-Layer Coefficients Pavement component Coefficient Wearing surface Sand-mix asphaltic concrete Hot-mix asphaltic (HMA) concrete Base Crushed stone Dense-graded crushed stone Soil cement Emulsion/aggregate bituminous Portland cement/aggregate Lime-pozzolan/aggregate Hot-mix asphaltic (HMA) concrete Subbase Crushed stone 0.35 0.44 0.14 0.18 0.20 0.30 0.40 0.40 0.40 0.11 The M, for subbase course material is 11,000 lb/in2. The M, for base course material is 25,000 lb/in2. Resilient (Elastic) modulus of asphalt concrete at 68☏ is 400,000 lb/in?. The base uses dense-graded crushed stone. The wearing surface is hot-mix asphaltic concrete. It is estimated that it takes a month for water to be drained from within the pavement, and at the same time the pavement will be exposed to moisture levels approaching saturation for 25% of the time. Transcribed image text: Using the 1993 AASHTO guide, design a flexible pavement to carry 5x10 ESALs (explicitly show layer thickness and relevant SNs).
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