Pilot In-service Performance Evaluation of Cable Barrier in Washington State PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Pilot In-service Performance Evaluation of Cable Barrier in Washington State PDF full book. Access full book title Pilot In-service Performance Evaluation of Cable Barrier in Washington State by Paul Abbott (Of the Washington State Department of Transportation). Download full books in PDF and EPUB format.
Author: Paul Abbott (Of the Washington State Department of Transportation) Publisher: ISBN: Category : Roads Languages : en Pages : 0
Book Description
A pilot routine in-service performance evaluation (ISPE) was undertaken for cable barrier following the process outlined in NCHRP 22-33. Barrier breach, rollover, vehicle mix, and secondary impacts on the roadside and roadway were evaluated as performance measures using data sourced from the Crash Location & Analysis System (CLAS) database and the WSDOT Engineering Crash Data Mart for years 2016 through 2020. Four Performance Assessment Levels, ranging from no exclusions of crash data to exclusions of crash data limited to vehicle type and speed limit were assessed. For all five performance measures, the study found no measurable difference between the performance of the four major types of cable barrier in use on state highways within WSDOT jurisdiction, including three-strand versus fourstrand.
Author: Paul Abbott (Of the Washington State Department of Transportation) Publisher: ISBN: Category : Roads Languages : en Pages : 0
Book Description
A pilot routine in-service performance evaluation (ISPE) was undertaken for cable barrier following the process outlined in NCHRP 22-33. Barrier breach, rollover, vehicle mix, and secondary impacts on the roadside and roadway were evaluated as performance measures using data sourced from the Crash Location & Analysis System (CLAS) database and the WSDOT Engineering Crash Data Mart for years 2016 through 2020. Four Performance Assessment Levels, ranging from no exclusions of crash data to exclusions of crash data limited to vehicle type and speed limit were assessed. For all five performance measures, the study found no measurable difference between the performance of the four major types of cable barrier in use on state highways within WSDOT jurisdiction, including three-strand versus fourstrand.
Author: Nathan Dowler Publisher: ISBN: Category : Languages : en Pages : 342
Book Description
The Kansas Department of Transportation (KDOT) installed 7.95 miles of cable median barrier (CMB) along K-10, K-96, and US-75 freeways in 2011 and 2012. In January 2020, KDOT funded a study to determine the in-service performance of its CMBs. In addition, KDOT sought to determine if it was cost-effective to modify guidelines for installing median barriers, which were based on annual daily traffic and median width. Researchers reviewed every crash within approximately 1⁄4 mile of a CMB installation and extracted crashes which involved a CMB impact. Researchers analyzed the critical details of each CMB crash, with particular emphasis on penetrations, in which a vehicle passed from the impact side to the opposite side of the barrier. In two penetration crashes, the vehicle completely traversed the median and encroached into the opposing lanes (CME), and one impacted an oncoming vehicle (CMC). Although the dataset was small, penetration and rollover rates were lower than other state DOT averages. Overall, the performance of the KDOT CMB was deemed acceptable and comparable to other states. Researchers investigated the cost-effectiveness of installing CMBs based on the frequency of critical crash events. A detailed examination of 16,721 crashes on non-continuously shielded, divided-median Kansas freeways from 2014 to 2018 was undertaken, which focused on median departures, crashes which reached the median centerline, CMEs, and CMCs. Benefit-to-cost ratios were calculated for various median widths, roadways, and traffic volume conditions. Previous median barrier warrant guidelines were determined to still be cost-effective and changes to KDOT policy were not recommended. A review of all off-road crashes which did not enter the median was conducted to examine any trends or characteristics between contributing factors or fixed objects struck. The relationship between crash cause and traffic volume was explored, identifying the traffic volume range at which each contributing factor was most prevalent. A disproportionate number of severe crashes following contact with bridge piers was observed, and recommendations were made for further analysis.
Author: Publisher: ISBN: Category : Bridges Languages : en Pages : 160
Book Description
Transportation Research Record contains the following papers: Environmental impact of runoff from highway construction and repair materials : project overview (Huber, WC, Nelson, PO, Eldin, NN, Williamson, KJ and Lundy, JR); Results of California Department of Transportation litter management pilot study (Lippner, G, Johnston, J, Combs, S, Walter, K and Marx, D); Environmental impact of construction and repair materials on surface water and groundwater : screening and evaluation methodology (Nelson, PO, Williamson, KJ, Azizian, MF, Thayumanavan, P, Huber, WC and Eldin, NN); Environmental impact of construction and repair materials on surface water and groundwater : detailed evaluation of waste-amended highway materials (Thayumanavan, P, Nelson, PO, Azizian, MF, Williamson, KJ and Lundy, JR); Characteristics of storm-water runoff from highway construction sites in California (Kayhanian, M, Murphy, K, Regenmorter, L and Haller, R); Estimation and internet-based dissemination of extreme rainfall information (Durrans, SR and Brown, PA); Step-pool morphology in high-gradient countersunk culverts (Maxwell, AR, Papanicolaou, AN, Hotchkiss, RH, Barber, ME and Schafer, J); Consideration of stream morphology in culvert and bridge design (Kosicki, AJ and Davis, SR); Compliance testing of a bullnose median barrier system : NCHRP report 350 (Bielenberg, BW, Reid, JD and Faller, RK); Washington State cable median barrier (Albin, RB, Bullard, DL and Menges, WL); W-beam guardrail adjacent to a slope (Polivka, Ka, Faller, RK, Sicking, DL and Rohde, JR); Improvements to the weak-post w-beam guardrail (Ray, MH, Engstrand, K, Plaxico, CA and McGinnis, RG); Three-strand cable median barrier in North Caroline : in-service evaluation (Hunter, WW, Stewart, JR, Eccles, KA, Huang, HF, Council, FM and Harkey, DL); Selection of roadside safety barrier containment level according to European Union standards (Montella, A); Unreported collisions with post-and-beam guardrails in Connecticut, Iowa, and North Carolina (Ray, MH and Weir, JA); Performance of w-beam splices (Ray, MH, Plaxico, CA and Engstrand, K); Development of two test level 2 bridge railings and transitions for use on transverse glue-laminated deck bridges (Faller, RK, Rosson, BT, Ritter, MA, Keller, EA and Duwadi, SR).
Author: American Association of State Highway and Transportation Officials. Task Force for Roadside Safety Publisher: ISBN: Category : Roads Languages : en Pages : 560
Author: Gerry E. Hendershot Publisher: ISBN: 9780840602220 Category : Birth control Languages : en Pages : 982
Book Description
The 1982 statistics on the use of family planning and infertility services presented in this report are preliminary results from Cycle III of the National Survey of Family Growth (NSFG), conducted by the National Center for Health Statistics. Data were collected through personal interviews with a multistage area probability sample of 7969 women aged 15-44. A detailed series of questions was asked to obtain relatively complete estimates of the extent and type of family planning services received. Statistics on family planning services are limited to women who were able to conceive 3 years before the interview date. Overall, 79% of currently mrried nonsterile women reported using some type of family planning service during the previous 3 years. There were no statistically significant differences between white (79%), black (75%) or Hispanic (77%) wives, or between the 2 income groups. The 1982 survey questions were more comprehensive than those of earlier cycles of the survey. The annual rate of visits for family planning services in 1982 was 1077 visits /1000 women. Teenagers had the highest annual visit rate (1581/1000) of any age group for all sources of family planning services combined. Visit rates declined sharply with age from 1447 at ages 15-24 to 479 at ages 35-44. Similar declines with age also were found in the visit rates for white and black women separately. Nevertheless, the annual visit rate for black women (1334/1000) was significantly higher than that for white women (1033). The highest overall visit rate was for black women 15-19 years of age (1867/1000). Nearly 2/3 of all family planning visits were to private medical sources. Teenagers of all races had higher family planning service visit rates to clinics than to private medical sources, as did black women age 15-24. White women age 20 and older had higher visit rates to private medical services than to clinics. Never married women had higher visit rates to clinics than currently or formerly married women. Data were also collected in 1982 on use of medical services for infertility by women who had difficulty in conceiving or carrying a pregnancy to term. About 1 million ever married women had 1 or more infertility visits in the 12 months before the interview. During the 3 years before interview, about 1.9 million women had infertility visits. For all ever married women, as well as for white and black women separately, infertility services were more likely to be secured from private medical sources than from clinics. The survey design, reliability of the estimates and the terms used are explained in the technical notes.
Author: Paul Abbott (Of the Washington State Department of Transportation)
Author: Paul Abbott (Of the Washington State Department of Transportation)
Author: Nathan Dowler
Author: 
Author: 
Author: 
Author: Institution of Electrical Engineers
Author: American Association of State Highway and Transportation Officials. Task Force for Roadside Safety
Author: Deb Bischoff
Author: 
Author: Gerry E. Hendershot