Road User Cost Models for Network-Level Pavement Management

2000 ◽  
Vol 1699 (1) ◽  
pp. 49-57 ◽  
Author(s):  
Govindarajan Vadakpat ◽  
Shelley Stoffels ◽  
Karen Dixon
Keyword(s):  
Life Cycle Cost ◽  
Pavement Management ◽  
Road User ◽  
Life Cycle Cost Analysis ◽  
Cost Models ◽  
User Cost ◽  
Microscopic Traffic Simulation ◽  
Maintenance And Rehabilitation ◽  
Economic Worth

Life-cycle cost analysis (LCCA) of pavements is a process for evaluating total economic worth of a usable project segment by analyzing initial costs and discounted future costs, such as those for maintenance, reconstruction, rehabilitation, and resurfacing. One of the most important ingredients in the LCCA process, at either a network level or a project level, is the determination of road user cost (RUC) during maintenance and rehabilitation operations. RUC models are also important in contracting strategies, which take into account time for a project to be completed for award and payment. Methods used to date to determine RUC are exclusively analytical in nature. Microscopic estimates of traffic are used to determine RUC. CORSIM, a microscopic traffic simulation program developed by FHWA, was used for this research. Models for additional travel time, added fuel consumption, and RUC for standard two-to-one lane closure scenarios are presented.

Regression Models of Road User Cost Prediction for Highway Maintenance and Rehabilitation for Life Cycle Planning in California

2021 ◽  
pp. 036119812110271
Author(s):  
Sampat Kedarisetty ◽  
Changmo Kim ◽  
John T. Harvey
Keyword(s):  
Life Cycle ◽  
Life Cycle Cost ◽  
Regression Models ◽  
Pavement Management ◽  
Work Zone ◽  
Road User ◽  
User Cost ◽  
Traffic Demand ◽  
Maintenance And Rehabilitation ◽  
The Impact

Road user costs (RUCs) have been studied for the past few decades and still need to be considered to obtain a complete picture of the impact of road construction, maintenance, and rehabilitation. RUCs comprise delay costs (value of time), vehicle operating costs, and accident costs. Federal Highway Administration’s Life Cycle Cost Analysis software RealCost has been adapted, customized, and enhanced by California’s Department of Transportation (Caltrans) for California’s traffic patterns and maintenance practices in RealCostCA. However, the different types of roadways, traffic distributions, and work zone types have not been analyzed. In addition, RealCostCA works for selecting the most cost-effective pavement alternative under a project-specific basis and does not address network-level integration of RUCs. This study aimed to build easy-to-use look-up tables to obtain RUCs for a factorial of different work zone and traffic conditions. Different combinations of three roadway types (freeways, state highways, county roads), four representative hourly traffic distributions, three typical work zone closures (10-hour nighttime, 24-hour, 55-hour weekend closure), the numbers of lanes available in normal conditions (no work zone), and the numbers of lanes open during work zones were included in the factorial to calculate RUCs for specific traffic demand ranges at an interval of 5,000 vehicles per day per direction. The data obtained were subsequently used to combine into mixed regression models. These models enable calculation of RUC at any traffic level customized to the location of the project. Future work will be undertaken to combine the models into Caltrans’ network-level pavement management system.

scholarly journals Karabük İçin Dış Duvar Optimum Yalıtım Kalınlığının Enerji Tasarrufu Ve Hava Kirliliğine Etkileri / The Effect Of External Wall Optimum Insulation Thickness On Energy Saving And Air Pollution For Karabük

2013 ◽  
Vol 1 (4) ◽  
pp. 402 ◽  
Author(s):  
Ali Etem Gürel ◽  
Yusuf ÇAY ◽  
Ali DAŞDEMİR ◽  
Enver KÜÇÜKKÜLAHLI
Keyword(s):  
Air Pollution ◽  
Natural Gas ◽  
Energy Saving ◽  
Life Cycle Cost ◽  
Life Cycle Cost Analysis ◽  
So2 Emissions ◽  
External Wall ◽  
Insulation Thickness ◽  
Optimum Insulation Thickness

Bina dış duvarlarında yapılacak ısı yalıtım uygulamaları, yakıt tüketimini düşürerek ekonomik kazanç sağlamanın yanında, fosil kaynaklı yakıt kullanımından kaynaklanan ve hava kirliliğine neden olan emisyonların düşürülmesinde de son derece etkilidir. Bu çalışmada Karabük’te kömür ve doğalgaz kullanımında dış duvar optimum yalıtım kalınlığı tespitinin ekonomik ve çevresel analizi yapılmıştır. Çalışmanın ekonomik boyutu, yaşam döngüsü maliyet analizine (LCCA) dayanan P1-P2 yöntemi ile gerçekleştirilmiştir. Çalışmanın sonuçları, yakıt olarak kömür kullanıldığında optimum yalıtım kalınlığı ve enerji tasarrufunun sırasıyla 0.135 m ve 129.42 TL/m² olduğunu göstermiştir. Yakıt olarak doğalgaz kullanımında ise bu değerler sırasıyla 0.118 m ve 98.01 TL/m² olarak bulunmuştur. Optimum yalıtım kalınlığının hava kirliliğine olan etkileri incelendiğinde, yalıtımsız bina dış duvarında hesaplanan yıllık yakıt tüketimi, CO2 ve SO2 emisyonlarının yakıt tipine bağlı olarak optimum yalıtım kalınlığı noktasında %86’ya kadar azaldığı hesaplanmıştır. The Effect Of External Wall Optimum Insulation Thickness On Energy Saving And Air Pollution For Karabük Heat insulation applications carried out on external walls of building provides energy saving by decreasing fuel consumption and also quite important in decreasing emission which results from fossil-based fuel usage and causes air pollution. In this study, economic and environmental analyses were done for determination of external wall optimum thickness in using coal and natural gas usage in Karabük. Economic extent of the study was done with P1-P2 method which is based on life cycle cost analysis (LCCA). The results show that optimum insulation thickness and energy saving are 0.134 m and 117.14 TL/m² respectively when coal is used as a fuel. These values are 0.116 m and 88.39 TL/m² when natural gas is used as fuel. When the effects of optimum insulation thickness on air pollution are observed, CO2 and SO2 emissions calculated on external wall of uninsulated building decreased up to 85.4% at the point of optimum insulation thickness according to fuel type.

Mechanistic-Empirical and Life-Cycle Cost Analysis for Optimizing Flexible Pavement Maintenance and Rehabilitation

2012 ◽  
Vol 138 (5) ◽  
pp. 625-633 ◽  
Author(s):  
Venkata Mandapaka ◽  
Imad Basheer ◽  
Khushminder Sahasi ◽  
Per Ullidtz ◽  
John T. Harvey ◽  
...  
Keyword(s):  
Life Cycle ◽  
Cost Analysis ◽  
Life Cycle Cost ◽  
Flexible Pavement ◽  
Life Cycle Cost Analysis ◽  
Pavement Maintenance ◽  
Maintenance And Rehabilitation
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