--- a/tracking.cfg	Wed Jun 26 17:28:45 2013 -0400
+++ b/tracking.cfg	Wed Jun 26 18:40:31 2013 -0400
@@ -10,7 +10,7 @@
 load-features = false
 # display trajectories on the video
 display = false
-# original video frame rate
+# original video frame rate (number of frames/s)
 video-fps = 29.97
 # number of digits of precision for all measurements derived from video
 # measurement-precision = 3
@@ -62,3 +62,12 @@
 min-velocity-cosine = 0.8
 # minimum average number of features per frame to create a vehicle hypothesis
 min-nfeatures-group = 3
+# Safety analysis
+# maximum speed when predicting future motion (km/h)
+max-predicted-speed = 50
+# time horizon for collision prediction (s)
+prediction-time-horizon = 5
+# collision distance threshold (m)
+collision-distance = 1.8
+# option to compute crossing zones and predicted PET
+crossing-zones = false
\ No newline at end of file