Graphics Programs Reference
In-Depth Information
Figure 3-14:
Sight distance analysis
indicators for roads
Road: Sight Zones
Sight zones are
colored lines that appear along the lane
you've selected. They indicate Sight Clear
areas (light greenish-blue) or Sight
Failure areas (yellow).
Road: Accident Zones
Accident zones
are areas that are especially prone to
accidents because of poor sight distance.
These are shown as dark greenish-blue
lines within the lane you're analyzing.
Road: Sight Envelopes
Sight
envelopes are light blue areas where
obstructions are analyzed and, if they're
found, are highlighted in orange.
You can also place a sight pin on your
analysis: a single point from which you
assess sight distance. There are visual
indicators for sight pins too (see
Figure
3-15
).
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