Clustering-based methodology for determining optimal roadway configuration of detectors for travel time estimation

Bartin, Bekir
İyigün, Cem
The problem of finding the optimal roadway segment configuration for road-based surveillance technologies to estimate route travel times accurately is addressed. This problem is inherently a space discretization problem regardless of which travel time estimation function is used. Its ad hoc solution is the equidistant segment configuration, such as every half mile or every 1 mi. It is shown that the space discretization problem can be expressed as the common clustering problem. The novelty of the proposed approach is the use of preliminary vehicle trajectory data to obtain statistically significant traffic regime at the study route. Clustering of sample space-time trajectory data is proposed as a viable methodology for solving the optimal roadway segment configuration problem.


Cost estimation of trackworks of light rail and metro projects
Öztürk, Erhan; Gündüz, Murat; Department of Civil Engineering (2009)
The main objective of this work is to develop models using multivariable regression and artificial neural network approaches for cost estimation of the construction costs of trackworks of light rail transit and metro projects at the early stages of the construction process in Turkey. These two approaches were applied to a data set of 16 projects by using seventeen parameters available at the early design phase. According to the results of each method, regression analysis estimated the cost of testing sample...
Dynamic effects of moving traffic on railway bridges
Cinek, Fatih; Yılmaz, Çetin; Department of Civil Engineering (2010)
In this study, dynamic effects on high speed railway bridges under moving traffic are investigated. Within this context, the clear definition of the possible dynamic effects is provided and the related studies that exist in literature are investigated. In the light of those studies, analytical procedures that are defined to find the critical dynamic responses such as deflections, accelerations and resonance conditions are examined and a MatLab programming language is written to obtain the responses for diff...
Simultaneous localization and mapping for a mobile robot operating in outdoor environments
Sezginalp, Emre; Konukseven, Erhan İlhan; Department of Mechanical Engineering (2007)
In this thesis, a method to the solution of autonomous navigation problem of a robot working in an outdoor application is sought. The robot will operate in unknown terrain where there is no a priori map present, and the robot must localize itself while simultaneously mapping the environment. This is known as Simultaneous Localization and Mapping (SLAM) problem in the literature. The SLAM problem is attempted to be solved by using the correlation between range data acquired at different poses of the robot. A...
Interactions between Driving Skills on Aggressive Driving: Study among Chinese Drivers
WU, Chaozhong; CHU, Wenhui; ZHANG, Hui; Özkan, Türker (SAGE Publications, 2018-12-01)
Aggressive driving has attracted significant attention recently with the increase in related road traffic collisions occurring in China. This study aims to investigate the effect of driving skills on aggressive driving behaviors and traffic accidents to find implications for traffic safety improvement in China. A total of 735 Chinese drivers were recruited to complete a self-reported survey including demographic information, the translated Driver Skill Inventory (DSI), and Driver Aggression Indicator Scale ...
Lifetime Performance Analysis of Existing Reinforced Concrete Bridges. II: Application
Akgül, Ferhat (American Society of Civil Engineers (ASCE), 2005-06-01)
This study, being the second part of a two-part paper, presents the application of a lifetime performance analysis methodology to three reinforced concrete bridges located in an existing bridge network in Colorado. The focus of this paper is on reinforced concrete slabs and girders of these bridges. The limit state equations were previously derived in the companion paper by grouping the random variables, deterministic parameters, and constant coefficients in such a way that the formulas are applicable to re...
Citation Formats
B. Bartin, K. OZBAY, and C. İyigün, “Clustering-based methodology for determining optimal roadway configuration of detectors for travel time estimation,” TRANSPORTATION RESEARCH RECORD, pp. 98–105, 2007, Accessed: 00, 2020. [Online]. Available: