Table 6.

Safety margins.

Vision Status	Lane	Median safety margin	Range	Median safety margin	Range	Median safety margin	Range
		Individual crossing speeds		4 ft/s		3.5 ft/s
AMD	Entry	−7.2	−18.5 to 15.7	−5.0	−16.2 to 18	−6.3	−17.5 to 16.7
	Exit	−5.25	−19.0 to 2.7	−3.35	−18.2 to 4.9	−4.1	−18.9 to 4.1
RP/GL	Entry	−3.25	−39.3 to 16.8	−3.4	−40.0 to 15.9	−4.7	−41.6 to 14.6
	Exit	−3.4	−8.5 to 10.0	−3.1	−8.3 to 9.5	−3.8	−9.1 to 8.8
FS	Entry	−3.1	−22.0 to 8.1	−3.9	−21.9 to 8.5	−5.2	−23.2 to 7.3
	Exit	−3.2	−10.3 to 17.6	−3.3	−9.8 to 17.4	−4.0	−10.6 to 16.7