Author: Abdula Mujība Khām̐Publisher:
ISBN:
Category : Climbing lanes
Languages : en
Pages : 104
Book Description
Cost-effectiveness of Climbing Lanes: Safety, Level of Service and Cost Factors
Author: Abdula Mujība Khām̐Publisher:
ISBN:
Category : Climbing lanes
Languages : en
Pages : 104
Book Description
Cost-effectiveness of Passing Lanes
Author: Ata M. KhanPublisher:
ISBN:
Category : Climbing lanes
Languages : en
Pages : 176
Book Description
Program PCL is an interactive, screen-oriented, menu-driven, PC-based software package for the analysis of the effect of adding passing or climbing lanes to selected locations along two-lane rural highways. The main analysis functions choose the start and end locations of a climbing lane based on the speed differential of a heavily loaded truck; predicts the effects on level of service and average speed of adding a passing or climbing lane; and performs a cost effectiveness analysis based on reduction of delay and reduction in accidents. This programmer's manual provides a general overview of program logic and extensive documentation of the internal workings of some portions of the PCL program, including the utility module and application details.
Cost-effectiveness of Passing Lanes : Safety, Level of Service, and Cost Factors
Author: A. M. KhanPublisher:
ISBN:
Category : passing lanes
Languages : en
Pages : 0
Book Description
Highway Research Abstracts
Author: Evaluating Safety and Operational Effectiveness of Truck Climbing Lanes Along Interstate 80 in Wyoming
Author: Muhammad Tahmidul HaqPublisher:
ISBN: 9780438100312
Category : Climbing lanes
Languages : en
Pages : 131
Book Description
Roadway safety is of a primary concern for all stakeholders in the transportation industry, as well as the general public. A major use of the highway system is the movement of goods, and the trucking industry keeps on contributing fundamentally to the nation’s economy. Over the recent years, the United States has encountered steady development in the amount of freight transported by truck because of globalization, trade growth, and improvements in logistics and supply chain management. In 2012, 4 million tons of freight in United States were transported by trucks, which accounted for 68.5 percent of the total freight weight. This percentage is expected to continue to grow in the next ten years. Although these improvements have prompted financial development, there has been a sharp increase in the extent of cargo/truck movement going along key routes that has caused significant interactions between trucks and other vehicles. In 2016, over 4,300 people died in large truck related crashes in the United States. The number of motor vehicle fatalities increased by 1,976 in 2016 compared to 2015, which was about 5.6% increase. Among these motor vehicle occupants killed in traffic crashes, approximately 21% were due to truck-related crashes. The approximate average cost of a large-truck related crash was more than $91,000. Wyoming is also encountering an extensive increase in truck movement along Interstate 80 (I-80). The increased interactions between trucks and other vehicles have raised many operational and safety concerns along I-80. According to Wyoming Department of Transportation (WYDOT) annual crash report, 65% of fatal truck crash (medium and heavy truck) occurred on interstate highways of Wyoming in 2016, and 54% of these fatal crashes were observed on I-80 in Wyoming. On the other hand, the presence of heavy truck traffic degrades the operational performance of roadway system. According to the Highway Capacity Manual (HCM), passenger cars can negotiate upgrades of 4% to 5% without a noticeable loss in speeds maintained on level roadways. However, the performance of trucks is greatly affected by vertical grades. Trucks start losing their speeds at freeway grades of about 1%. Trucks generally decrease speed by more than 7% on upgrades as compared to their operation on level terrains. The reduction in truck speeds depends on the rate and length of grades, as summarized by the HCM. This causes a lot of friction between passenger cars and trucks on upgrades, with a noticeable difference in speeds. Also, because of the high truck percentage, it is very common for trucks to use the left lane, which causes a queue buildup behind them and leading to deteriorated traffic conditions. This study investigated the impacts of truck traffic on selected upgrades of freeway segments along I-80 in Wyoming and climbing lanes were considered as one of the potential mitigation strategies to enhance operational efficiency and safety. Cross-sectional analysis was adopted to evaluate the safety effectiveness of climbing lanes. Data were collected from different sources and Wyoming-specific Safety Performance Functions (SPFs) were developed using crash data from 2008 to 2016 for different severity levels and crash types. All the segments were selected from I-80 in Wyoming with climbing lanes as treatment sites, and segments with similar geometrical characteristics without climbing lanes as comparison sites. The Negative Binomial (NB) and Zero-Inflated Negative Binomial (ZINB) model were used to develop Wyoming-specific SPFs for I-80 as they were found to fit better for the crash data. The Crash Modification Factors (CMFs) for climbing lanes were found effective in reducing different severity levels and crash types. For operational analysis, a ten-mile eastbound segment along I-80 (MP 313 – MP 323) was chosen, and the traffic volume and roadway geometry associated with this segment were collected to evaluate the climbing lane efficiency for this specific segment. A combination of VISUM and VISSIM was applied to develop microsimulation model for both current and future (the year 2027 and 2037) traffic conditions at selected segment of I-80 corridor. It was found that the installation of climbing lanes has the potential to improve operational performances (average delay, total delay, total travel time, average speed) for a 10 and 20-year planning horizon.
Microlog, Canadian Research Index
Author: Publisher:
ISBN:
Category : Canada
Languages : en
Pages : 1322
Book Description
An indexing, abstracting and document delivery service that covers current Canadian report literature of reference value from government and institutional sources.
Cost-effectiveness of Climbing Lanes : User's Manual
Author: Ata M. KhanPublisher: Downsview, Ont. : Research and Development Branch, Ontario Ministry of Transportation
ISBN:
Category :
Languages : en
Pages :
Book Description
Cost-effectiveness and Highway Safety
Author: University of Southern California. Dept. of Industrial and Systems EngineeringPublisher:
ISBN:
Category : Cost effectiveness
Languages : en
Pages : 124
Book Description
Author: Ata M. Khan
Author: Jan Louis Botha