Table 3.

Comfort levels related to a_wz threshold values as proposed by ISO 2631 for public transport.

${\mathit{a}}_{\mathit{w}\mathit{z}} \mathbf{Values} (\mathbf{m}/{\mathbf{s}}^2)$	Ride Number
less than 0.315	Not uncomfortable
0.315–0.63	Little uncomfortable
0.5–1.0	Fairly uncomfortable
0.8–1.6	Uncomfortable
1.25–2.5	Very uncomfortable
more than 2.5	Extremely uncomfortable