Optimizing highway maintenance operations: dynamic considerations

2010 ◽  
Vol 26 (3) ◽  
pp. 216-238 ◽  
Author(s):  
Saeideh Fallah-Fini ◽  
Hazhir Rahmandad ◽  
Konstantinos Triantis ◽  
Jesus M. de la Garza
Keyword(s):  
Highway Maintenance

Study of highway asphalt pavement recycling maintenance scheme decision system and decision method

2021 ◽  
pp. 1-10
Author(s):  
Hongjun Jing ◽  
Ping Yao ◽  
Lichen Song ◽  
Jiahao Zhang ◽  
Yanlong Zhao ◽  
...  
Keyword(s):  
Decision Making ◽  
Evaluation System ◽  
Evaluation Method ◽  
Comprehensive Evaluation ◽  
Asphalt Pavement ◽  
Economic Benefits ◽  
Highway Maintenance ◽  
Decision System ◽  
Recovery Index ◽  
Pavement Recycling

With modern economic and social development, the technical and economic requirements of highway maintenance and construction projects have become increasingly complicated. Meticulous and in-depth investigation and demonstration guided by scientific theories and methods are of considerable importance to highway maintenance scheme decision. As basis for the selection of highway asphalt pavement recycling maintenance scheme, the factors influencing the decision are analytically demonstrated and an evaluation system is proposed, including three major decision indexes: applicability of recycling mode, recycled pavement quality recovery index, and economic benefit. According to the principles of data statistics and analysis, this study proposes a calculation method for the recycled pavement quality recovery index, analyzes the economic benefits of decision schemes using economic models such as recycling ratio and cost, and puts forward an optimal evaluation method of engineering cost and its fuzzy score intervals. Index weights are calculated through the analytic hierarchy process, and the comprehensive decision evaluation system and comprehensive evaluation method are established. Subsequently, the decision-making method is analyzed on the basis of the decision system by combining the related data. Results show maximum weight of the pavement quality recovery index and minor differences among four recycling schemes in the quality recovery index and applicability. The decision-making results are simplified with clear hierarchical feature because of the fuzzy score intervals of each index. Findings can provide a reference for the asphalt pavement recycling scheme decision.

Are Specifications of Signaling Systems for Emergency, School Bus, and Service Vehicles Adequate?

1979 ◽  
Vol 23 (1) ◽  
pp. 282-284
Author(s):  
David V. Post
Keyword(s):  
Light Signaling ◽  
Highway Maintenance ◽  
School Bus ◽  
Signaling Systems ◽  
Accident Data ◽  
Lighting Systems ◽  
Service Vehicles ◽  
Nationwide Implementation

Although accident data are limited, a review of the lighting requirements for special purpose vehicles including police, fire, ambulance, highway maintenance, and service vehicles, revealed that lighting systems for these vehicles are poorly specified. A lack of consistancy, rigor, and meaningfulness is evident both in legal specifications and current use of light signaling systems on emergency and non-emergency special purpose vehicles. Adoption of a proposed signaling scheme for special purpose vehicles is recommended. By nationwide implementation of such a scheme both consistancy and meaningfulness could be imparted to special purpose vehicular signaling. Rigor will have to be derived from research aimed at determining the proper parameters to produce conspicuous signal lights.

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