University of Massachusetts Amherst

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Caliper Implemented Dr. Daiheng Ni's Research in its TransModeler Software

Professor Daiheng Ni's Longitudinal Control Model (LCM), a mathematical model that captures vehicle dynamics in road traffic, has been implemented by Caliper in its TransModeler traffic simulation software as one of the underlying algorithms of traffic flow modeling. Derived from first principles, LCM model is a state-of-the-art tool to help transportation engineers analyze highway traffic flow, congestion, and mitigation. Caliper Corporation ( is a technology leader in the development of geographic information systems (GIS) and transportation software. It is well known in the transportation profession for its TransCAD® transportation planning software and TransModeler® traffic simulation software.