  The NGSIM trajectory data are used to calibrate two car-following models -
the IDM and the FVDM. We used the I80 dataset which has already been
reconstructed to eliminate outliers, unphysical data, and internal and platoon
inconsistencies contained in the original data.We extract from the data
leader-follower pairs and platoons of up to five consecutive vehicles thereby
eliminating all trajectories that are too short or contain lane changes. Four
error measures based on speed and gap deviations are considered. Furthermore,
we apply three calibration methods: local or direct calibration, global
calibration, and platoon calibration. The last approach means that a platoon of
several vehicles following a data-driven leader is simulated and compared to
the observed dynamics.
