Research Report No. FHWA-ICT-13-015 Seismic Performance of Quasi-isolated Highway Bridges in Illinois is now published and available online. The report, which is authored by J. LaFave, L. Fahnestock, D. Foutch, J. Steelman, J. Revell, E. Filipov and J. Hajjar, describes an extensive numerical earthquake simulation study that was conducted as part of the project Calibration and Refinement of Illinois’ Earthquake Resisting System Bridge Design Methodology.