STATEWIDE AND UPPER MIDWEST SUMMARY OF DEER-VEHICLE CRASH AND RELATED DATA FROM 1993 TO 2003:
Regional Data
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This
report used only a portion of the data available from the Upper Midwest
Region.
To
view all regional data, including
the most recent data available, please
CLICK HERE.
Regional
Data Summary
The
2002 (last year that data from all five states was available) DVC percentage
(AVCs for Iowa) of all crashes reported in the Upper Midwest was approximately
10.7 percent. The annual total number of reported DVCs (AVCs for Iowa)
has increased by about 17.3 percent in the Upper Midwest between 1993
and 2000. An evaluation of the DVC- or AVC-related data from Illinois,
Iowa, Michigan, Minnesota, and Wisconsin showed the following general
patterns:
•
The annual total number of crashes reported and available for the Upper
Midwest is shown in Figure 1 (See figure for the data that were not available).
Overall, the annual number of crashes reported in the Upper Midwest has
been generally stable when data for all five states were available (i.e.,
1993 to 1995, 2000, and 2002). For these five years, the total annual
number of crashes reported in the region ranged from 1,099,343 in 1993
to 1,204,208 in 1995 (with a similar number of crashes reported in 2000).
The average annual total number of crashes reported from 1993 to 1995,
2000, and 2002 was 1,157,465. The AVMT in Upper Midwest has consistently
increased during the study time period (See Figure 2).
• Overall, the annual number of reported DVCs (AVCs in Iowa) increased
quite quickly from 1993 to 1995 and then continued to increase at a slower
rate from 1995 to 2003. An increase of 16.6 percent occurred between 1993
and 1995, and a further increase of 5.2 percent happened between 1995
and 2003. Overall, there has been a 22.7 percent increase in the annual
number of DVCs reported in the Upper Midwest between 1993 and 2003.
• The percentage of total crashes represented by DVCs also increased
from 9.2 percent in 1993 to 10.9 percent in 2002 (the last year with data
from all five states available). It should be noted, however, that this
regional percentage increased dramatically (See Figure 4) when the non-fatal
crashes from the city of Chicago were not available (e.g., 1996 to 1999)
for this calculation. Excluding 1996, due to questions about the DVC data
provided by Illinois, the average DVC/AVC percentage for the region was
about 13.7 percent for this time period.
• The annual number of fatalities in the Upper Midwest due to DVCs
ranged from 12 to 45 between 1993 and 2003.The number of injuries and
fatalities due to DVCs increased from 3,900 in 1993 to 5,342 in 1999 (an
increase of 37 percent), but then decreased to 4,981 in 2002. A total
of 51,609 DVC injuries were reported during the eight years for which
this data was used or available (although there were also two additional
years when non-fatal crashes from the City of Chicago were not available).
• The Upper Midwest DVC rate (i.e., the number of DVCs per HMVMT)
was relatively stable from 1993 to 2003 (See Figure 43). The variability
that does appear in Figure 43 is primarily due to the inability to use
the crash data from at least one state in 1996, 2001, and 2003. The largest
DVC rate in the Upper Midwest, when the crashes from all five states were
used, was 38.8 DVCs per HMVMT in 1995, and the smallest was 34.8 per HMVMT
in 2002. The average annual DVC rate for all five states from 1993 to
2003 was 36.1 DVCs per HMVMT.
• Four states in the Upper Midwest provided annual deer population
estimates for most of the 1993 to 2003 time period. Three states also
provided deer carcass removal numbers. For comparison purposes, the annual
deer population estimates shown in Figure 44 are only for those in which
DVC data were also available (this excludes 1993, 2001, and 2003). The
Upper Midwest annual deer population estimates shown in Figure 7 generally
follow a cyclical pattern (a similar pattern is also followed when the
deer population estimates of all four states are plotted, but with a relatively
stable annual estimate past 2000). From 1994 to 1995 there was an increase
in the estimated deer population and from 1995 to 1997 there was a decrease.
The minimum deer population estimate, when data from all four states were
used, was 4,029,682 deer in 1997. The deer population estimate increased
from 4,029,682 deer in 1997 to a maximum of 5,107,837 deer in 2000. The
number of carcasses removed from the roadside, on the other hand, generally
increased from 61,429 in 1993 to 69,148 in 1996 (a 12.6 percent increase)
and then stabilized from 1996 to 2000 (averaging 68,015). The number of
carcasses removed ranged from about 170 to 210 percent of the DVCs reported
between 1993 and 2003 (when data from all three states were used). The
average of this measure was about 200 percent.
FIGURE
1 Total crashes reported in the Upper Midwest (1993 to 2003).
|
FIGURE 2 Annual vehicle-miles-traveled in the Upper Midwest (1993 to 2003). |
FIGURE
3 Reported deer-vehicle crashes in the Upper Midwest (1993 to 2003).
|
FIGURE
4 Percent deer-vehicle crashes in the Upper Midwest (1993 to 2003).
|
FIGURE
5 Number of deer-vehicle crash fatalities and injuries in the Upper
Midwest (1993 to 2003).
|
FIGURE
6 Deer-vehicle crash rate per 100 million vehicle-miles-traveled
in the Upper Midwest (1993 to 2003). |
FIGURE
7 Pre-hunt deer population estimates and deer-vehicle crashes in
the Upper Midwest (1993 to 2003). |
FIGURE
8 Roadside carcass removals and reported deer-vehicle crashes in
the Upper Midwest (1993 to 2003). |
This
report used only a portion of the data available from the Upper Midwest
Region.
To
view all available regional data, please CLICK
HERE.