Download or read book Effectiveness of Rumble Strips on Texas Highways written by Paul John Carlson and published by . This book was released on 2003 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Guidance for the Design and Application of Shoulder and Centerline Rumble Strips written by Darren J. Torbic and published by Transportation Research Board. This book was released on 2009 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report provides guidance for the design and application of shoulder and centerline rumble strips as an effective crash reduction measure, while minimizing adverse effects for motorcyclists, bicyclists, and nearby residents. Using the results of previous studies and the research conducted under this project, safety effectiveness estimates were developed for shoulder rumble strips on rural freeways and rural two-lane roads and for centerline rumble strips on rural and urban two-lane roads.

Download or read book Use of Rumble Strips to Enhance Safety written by Douglas W. Harwood and published by . This book was released on 1993 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: This synthesis will be of interest to traffic engineers, highway design engineers, highway maintenance personnel, those responsible for toll plaza design and operation, and others concerned with the operation, safety and design of the roadway environment. Information is presented on the various applications of rumble strips on the traveled way and on highway shoulders. This synthesis describes the state of the practice with respect to placement, operational and safety effects, design, installation, and cost and service life of rumble strips. This report of the Transportation Research Board also discusses the effectiveness of rumble strips in preventing or reducing accidents. It provides information on the potential adverse effects of rumble strips, such as noise, motorist use of opposing lanes to avoid rumble strips, maintenance problems, and concerns of special users such as senior citizens, bikers, and truckers. The need for signing and public information support are also discussed. The synthesis presents several recommendations for future research.

Download or read book A Study of Effectiveness of Various Shoulder Rumble Strips on Highway Safety written by Chung S. Chen and published by . This book was released on 1994 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Run-off-the-Road (ROTR) type of accident has been a predominant factor in highway fatalities nationwide. This situation has created a major concern and challenge for traffic management within transportation departments. Shoulder rumble strips are new traffic control devices for interstate and limited access roadway systems, which hold great potential for reducing ROTR accidents. Consequently, they have become a critical and attractive subject for highway safety improvements. Although shoulder rumble strips have been recognized as an effective measure and have been widely tested by 35 state agencies and several countries, the rolled type rumble strip is found most often in the literature. The optimal design patterns among the available types and their effectiveness have not been quantitatively tested and confirmed. This paper reexamines different typical patterns using field tests, implementation surveys from agencies, and mathematical analysis. A model has been developed to determine the optimal patterns. The results reveal that a milled pattern is superior to a rolled pattern for asphalt shoulders in terms of audibility and tactility effectiveness, quality control and ease of construction. The corrugated pattern is practical for concrete shoulders. Evidence is presented that existing implementation of policy and design criteria for rolled rumble strips should be modified and that more research is needed to determine the degree of effectiveness.

Download or read book Work Zone Traffic Management Synthesis written by and published by . This book was released on 1989 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Safety Effectiveness of Centerline Rumble Strips and Shoulder Rumble Strips on Louisiana Two lane Highways written by Sushmita Khanal and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Evaluation of Rumble Strips at Rural Stop controlled Intersections in Texas written by Tyrell D. Thompson and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Major safety concerns are present at rural high speed intersections. When long uninterrupted tangents are located near rural intersections, the drivers can become inattentive to upcoming decision points. Traffic control devices could aid in mitigating these occurrences by warning drivers of upcoming decision points. One such device is transverse rumble strips, which act to provide motorists with an audible and tactile warning that their vehicle is approaching a decision point of critical importance to safety. The objective of this research was to determine if the presence of transverse rumble strips were an effective warning device for drivers approaching rural stop-controlled intersections. To evaluate the effectiveness of transverse rumble strips, vehicle speeds were measured at three locations along the approach to an intersection both before and after the installation of rumble strips. Vehicle speeds were measured at nine rural stop-controlled intersection sites in Texas. Overall, the installation of rumble strips generally produced small, but statistically significant (p [less than or equal to] 0.05), reductions in traffic speeds. There were some negative driver behavioral impacts (i.e., speed increases) that occurred after the installation of rumble strips. There were a few instances where speed change reductions of greater than 1 mph occurred, however, the overall trend was that speed change reductions were equal to or less than 1 mph. Although the rumble strips did not produce meaningful reductions in traffic speeds, they should still be considered based upon previous accident reductions and minimal installation costs.

Download or read book Centerline Rumble Strips written by Eugene Russell and published by Transportation Research Board. This book was released on 2005 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: TRB's National Cooperative Highway Research Program (NCHRP) Synthesis 339: Centerline Rumble Strips (CLRS) examines current design, installation, configuration, dimension, and visibility issues associated with CLRS. The report addresses the need for guidance on warrants, benefits, successful practices, and concerns such as external noise and the reduced visibility of centerline striping material. Also addressed are pavement deterioration, ice buildup in the grooves, adverse impact on emergency vehicles, and the effect of CLRS on bicyclists. Particular attention was paid to available before-and-after CLRS installation crash data to document the safety aspects of CLRS and the availability of policies, guidelines, warrants, and costs regarding their use and design.

Download or read book Long term Pavement Marking Practices written by James Migletz and published by Transportation Research Board. This book was released on 2002 with total page 165 pages. Available in PDF, EPUB and Kindle. Book excerpt: TRB's National Cooperative Highway Research Program (NCHRP) Synthesis 306: Long-Term Pavement Marking Practices documents the current and best practices for managing pavement marking systems, identifies future needs, and addresses driver needs and methods of communicating information to drivers, selection criteria (e.g., reflectivity, pavement service life, wet weather performance), materials (e.g., color, durability, cost), specifications, construction practices, inventory management systems, and more.

Download or read book Evaluation of the Effectiveness of Rumble Strip Construction in the Travel Lane written by Carrie A. Sutton and published by . This book was released on 1995 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book An Evaluation of Shoulder Rumble Strips in Montana written by Robert R. Marvin and published by . This book was released on 2003 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt: An evaluation of shoulder rumble strip's effectiveness in reducing off-road and rollover crashes on Montana's highway system utilized 10 years of crash data on 393 miles of Interstate Highways and 213 miles of National Highway System (NHS) and Primary Highways. Statistical analysis of crash data involved rumble strip segments and control segments without rumble strips for 3 year periods before and after implementation of shoulder rumble strips. Descriptive statistics were developed from global data sets and comparative statistics on equivalent segments produced a finding of significant crash reductions on Interstate Highways, while the effect of shoulder rumble strips on NHS and Primary Highways was uncertain due to an inadequate sample size. Analysis of contingency tables indicate that the reduction in Interstate off-road crash rates attributable to shoulder rumble strips was 14.0% with a corresponding reduction of 23.5% in severity rates. The benefit/cost ratio for construction of shoulder rumble strips on Interstate highways was 19.5. A shoulder rumble strip driver survey involving questions related to knowledge of rumble strips, frequency of encounters, reaction to exposure, and general opinions on their use was incorporated as part of the study. The survey indicated that 95% of the driving public was familiar with rumble strips and their use with the majority of drivers encountering rumble strips on every highway trip. The overwhelming majority of motorists liked the benefits that shoulder rumble strips provide.

Download or read book Crash Impact of Smooth Lane Narrowing with Rumble Strips at Two lane Stop controlled Intersections written by and published by . This book was released on 2010 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book An Investigation of Passing Operations on a Rural Two lane Two way Highway with Centerline Rumble Strips written by Jeffrey David Miles and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The research in this thesis was conducted to investigate the initial stage of passing maneuvers on a rural, two-lane, two-way (RTLTW) highway with centerline rumble strips (CRSs). Four measures of effectiveness were used: (1) number and type of erratic movements by a passing vehicle, (2) number of and time between centerline encroachments of a passing vehicle, (3) gap distance of a passing vehicle, and (4) centerline crossing time. Data were collected for a before-and-after analysis at one site, in Comanche County, Texas. The test section was on US 67 from Comanche, Texas to the county line south of Dublin, Texas. The posted speed limit for this RTLTW highway was 70 mph during the day. CRSs were installed along approximately 15 miles of US 67. Only one test design for CRSs was installed. The design specification was for a CRS to be milled to a 0.5-inch depth, 7-inch length, and 16-inch width. This specification was developed from current state practices throughout the United States. CRSs were installed continuously through passing and no-passing zones, and they were spaced at 24 inches on-centers. Pavement markings were striped over the CRSs. Data were collected using an innovative data collection system developed by the author through the Texas Transportation Institute (TTI). This system was mounted to a four-door sedan, and it consisted of four concealed cameras that recorded the entire passing maneuver around the data collection vehicle. Data were collected at three different speeds during the daytime. The speeds were 55, 60, and 65 mph (15, 10, and 5 mph, respectively, under the posted speed limit). Based on the assessment of the four MOEs, the overall finding of this thesis was that driver performance during the initial phase of passing maneuvers was not negatively impacted after the installation of CRSs on US 67. The caveat is that differences in the weather conditions may have influenced the results. The weather was dry with clear skies at the study site during data collection prior to the installation of CRSs; however, the weather consisted of intermittent rain during the data collection after the installation of CRSs.

Download or read book Cost effectiveness Program for Roadside Safety Improvements on Texas Highways written by and published by . This book was released on 1974 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Policy Considerations and Evaluation of the Safety Effectiveness of Rumble Strips in Wyoming written by Mirza Ahammad Sharif and published by . This book was released on 2015 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rumble strips/stripes are used by many states as a relatively low cost proven safety countermeasure to reduce or prevent lane departure crashes by providing a vibrotactile and audible warning to inattentive motorists. Although the advantages of rumble strips are generally found to outweigh the disadvantages, several issues and concerns have been identified regarding the implementation of rumble strips. The main goal of this study is to develop an effective policy of shoulder and centerline rumble strips/stripes in the State of Wyoming to enhance motor vehicle safety while accommodating all road users to the highest practical extent. Surveys were conducted to assess road users' concerns about rumble strips. Moreover, several issues regarding the use of rumble strips/stripes including: construction, maintenance, and noise are discussed. With the help of WYDOT, information regarding the state of practice of rumble strips/stripes in the U.S. was collected. Information was obtained through a review of the literature, online survey, and email communication with States DOTs. Thirty states responded to the online survey. Only four agencies have fully adhered to the NCHRP guidelines; Idaho, Mississippi, Nevada, and New Mexico. Fifteen agencies indicated that they are using the guidelines provided by NCHRP with some modifications to suit the needs of their region. Seven agencies are using their own guidelines; Alabama, Kentucky, Massachusetts, New Hampshire, North Dakota, Texas, and Wyoming. Among the agencies which took the survey, only Oklahoma responded that they do not have a written policy for rumble strips. Based on the DOTs guidelines identified recently from the literature and survey responses, thirty state agencies have already made provisions to accommodate bicyclists. Only three agencies responded that they do not have any provisions for bicyclists while the remaining eighteen state agencies indicated that they do not have adequate information to address this issue. The rest of the survey results showed that many DOTs are still updating their rumble strip policies. DOTs which had already been using their own guidelines are now moving forward to accommodate the non-conventional vehicles and nearby residents. About 72 percent of the states are following the NCHRP Report 641 guideline, either strictly or with some modifications. Application criteria and maintenance practices vary by state. Shoulder rumble strips are more widely used than centerline rumble strips or shoulder rumble stripes. Rumble strips are installed mostly on rural roadways since they possess fewer constraints on installation criteria. All of the 30 states which responded to the survey are using SRS and among them 27 states are using CLRS. The use of the combination of SRS and CLRS is not adopted by all the states, only 55 percent of the states are using both types in combination. Although the NCHRP 641 issued guidance on how state agencies can balance the increase in rumble strips implementation while accommodating all roadway users, 16 percent of state DOTs have indicated that their policies do not have any provisions for bicyclists when installing rumble strips, whereas, 42 percent of the DOTs do not consider noise when installing rumble strips. Most of the DOTs commented that they try to avoid installing rumble strips in urban areas to prevent noise. From the survey responses, information gathered in earlier surveys, and from synthesis documents; it was found that 36 states made provisions to accommodate bicyclists; while only 3 states; Idaho, Maine, and Florida attempted to accommodate motorcyclists. Maine DOT provides skip pattern on centerline rumble strips in rumble strips to facilitate motorcycle lane changes. Idaho DOT uses centerline rumble strips only in no-passing zones. The governing criteria ranked by DOTs when a roadway is considered for installing rumble strips are in the following order; area type (urban vs. rural), guardrail, pavement type, pavement thickness, bicycle traffic, motorcyclists, noise, nearby residents. An Expert System has been developed to provide an interactive easy way to navigate through rumble strips/stripes practices and guidelines in the U.S. It is recommended that the information compiled in the 'Expert System' should be fully utilized when adopting a new policy. It is also recommended that other DOTs implement or upgrade their rumble strips policies may utilize recent information presented in this study. Nine rural two-lane segments of 121.6 miles were identified for safety effectiveness analysis and to calibrate Crash Modification Factors (CMF) for rumble strips in Wyoming. Three years of crash and traffic data in the before and after were used to conduct a Naïve before-after analysis. The results showed significant effect of shoulder rumble strips on reducing target crashes and total crashes. Total crashes reduced by 40%. Additionally, Fatal and Injury (F+I) crashes, and Single Vehicle Run-Off-Road (SVROR) crashes reduced by 44% and 39%, respectively.

Download or read book Centerline Rumble Strips written by William Outcalt and published by . This book was released on 2001 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report presents an evaluation of centerline rumble strips on a two-lane mountain highway. Accident data before and after construction is given to demonstrate the improvement in safety. Visual evaluations of the effects of the rumble strips on the condition of the pavement and centerline striping are given. Centerline rumble strips are recommended for installation on two-lane highways where there is a history of crossover (head-on and sideswipe from opposite directions) type accidents.

Download or read book Effectiveness of Shoulder Rumble Strips written by Rick L. Morgan and published by . This book was released on 1997 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt: