•Create a data parsing system to process real-time traffic sensor data in HEX format. •Assess sensor health using multinomial logistics regression and support vector machine.•Develop traffic flow models to predict traffic states on Orange County freeway network.•Implement cell transmission traffic simulation model using Matlab•Develop a web-based traffic network editor for the simulator using JavaScript

•Analyzed system-wide bus ridership time series to guide schedule change.•Developed web pages to visualize ridership data using D3.js.•Developed programs to generate bus schedule data from Google transit feed using R.