Byung-Hee Han

Date of Award


Degree Name

Master of Science


Civil and Construction Engineering

First Advisor

Dr. Jun-Seok Oh

Second Advisor

Osama Abudayyeh

Third Advisor

Ahmad Jrade

Access Setting

Masters Thesis-Open Access


Intersection control delay is considered a primary measure for determining the level of service at signalized intersections. This thesis develops a technique estimating intersection delay using GPS data from GPS-enabled vehicles. First, this study analyzes existing methods that estimate control delays using GPS data and proposes an improved technique in response to the weakness of those methods. The proposed method estimates the control delay well with better accuracy covering the weaknesses. However, the control delay from the GPS data has a sample size problem for determining the level of service at signalized intersections. Therefore, this thesis proposes a data fusion technique using the data from both GPS devices and loop detectors in order to be able to estimate delays and the level of service at signalized intersections with the small number of GPS-enabled vehicles. The data fusion technique developed in this study improves the accuracy by 59.6% with one GPS-enabled vehicle.