40 3. STABILITY OF UNTRIPPED VEHICLE ROLLOVER
maneuver at 90 km/h and a Fishhook maneuver at 64 km/h, respectively. It is also obvious from
these figures that the PLTR provides a small but important time advance compared with the
LTR index. Further, in all these experimentally validated steering maneuvers, there is a good
match in the shape of LTR and PLTR trajectories.
3.3 SUMMARY
As scholars develop a deeper understanding, the stability of untripped rollover is well docu-
mented. e rollover index of untripped rollover includes SSF, DSF, and LTR. e LTR is the
most effective. In order to predict the vehicle rollover state, sufficient reaction time is left for
the driver, scholars put forward the early warning method of rollover includes time-to-rollover
and prediction rollover warning.
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