This paper presents a method for predicting the optimum initial service life and optimum periods of resurfacing for flexible pavements. The method is based on consideration of total pavement costs including the cost of initial construction, routine maintenance and major maintenance and increased road user costs resulting from the maintenance operations. Standard economic analyses techniques wer...

BACKGROUND Sleep onset and maintenance problems are a frequent complaint after traumatic events in children. However, the association of traumatic experiences and disturbed sleep remains to be explained. OBJECTIVE To examine the incidence of sleep onset and maintenance problems in children after road traffic accidents and identify potential predictors of sleep onset and maintenance problems, ...

Suboptimal haul road management policies such as routine, periodic and urgent maintenance may result in unnecessary cost, both to roads and vehicles. A recent idea is to continually access haul road condition based on measured vehicle response. However the vehicle operating conditions, such as its instantaneous speed, may significantly influence its dynamic response resulting in possibly ambigu...

Road pavements are an important part of transportation infrastructure and require regular maintenance. This study aimed to model the condition road pavement by probabilistic method Markov chains. The used in this is a literature data collection from survey conditions field. Data analysis was performed using chain method, which can be changes over time. results showed that with high accuracy. al...

The International Roughness Index (IRI)'s survey is a longitudinal profile to determine of road. purpose this provide an overview road conditions and input in optimizing the maintenance rehabilitation existing roads city Palangka Raya. data used for analysis IRI’s from surveys on several that represent Raya City with RoadLabPro application car. results showed Beruk Angis had average IRI value 9...

Road traffic accidents comprise 20% of the total burden of injury among elderly. Evidence based good practices show that it is possible to reduce injuries in elderly people by relatively cost effective methods. Integrated strategies including alternative public transport options, new technology in vehicle design and regulations. Road infrastructure and maintenance measures, such as those below ...

Increasing cycling as a means of personal travel could generate environmental benefits if associated with a corresponding decrease in car-based transport. In seeking to promote cycling in wintertime, it is desirable to understand how important the road surface condition is compared to other factors in people’s decision to cycle or not. In this thesis, the possibility of increasing the number of...

Automated systems for road crack detection are extremely important in road maintenance for vehicle safety and traveler’s comfort. Emerging cracks in roads need to be detected and accordingly repaired as early as possible to avoid further damage thus reducing rehabilitation cost. In this paper, a robust method for Gabor filter parameters optimization for automatic road crack detection is discuss...

We introduce an approach for modelling the structural deterioration of components of bridges for maintenance optimization purposes. The Markov chain model is found in the maintenance and repair problems since the early 60's, is introduced to the maintenance of road infrastructure in the 1980's, and is made to drive the current bridge maintenance optimization systems. While this model results in...