1 MARCH 2000
(2) Visibility. Clear visibility criteria for approaching and stopped vehicles is shown in figures 7-17
and 7-18, with distances A and B determined from table 7-2. A crossing is considered visually
unobstructed if the triangular area defined by distances A and B is sufficiently clear that a motorist can
see approaching trains anywhere within that field of view. Crossings that do not meet this clear visibility
criteria may require additional protection.
Figure 7-17. Clear Crossing Visibility Area for Approaching Vehicles