Spatial Influence Analysis of Traffic Safety in Diverging Areas between Freeway Segments and Off Ramps

Table 3

Summary statistic of crash frequency from feet to feet.

Variable	Mean	Std. deviation	Variance	Minimum	Maximum
Crash_30feet	0.61	2.17	4.69	0	15
Crash_60feet	2.69	7.54	56.78	0	61
Crash_90feet	4.38	10.19	103.79	0	70
Crash_120feet	5.75	13.02	169.57	0	96
Crash_150feet	7.96	17.77	315.79	0	134
Crash_180feet	10.04	23.98	574.94	0	190
Crash_210feet	13.13	27.08	733.29	0	199
Crash_240feet	14.78	27.91	778.88	0	208
Crash_270feet	16.69	29.23	854.55	0	218
Crash_300feet	18.99	29.96	897.39	0	221
Average	9.50	18.11	328.10	0	140