The emergency vehicle crash rate fell by 71 percent after deployment of emergency vehicle signal preemption systems in St. Paul, Minnesota.

10

St. Paul
Minnesota
United States
Identifier
2001-00225
TwitterLinkedInFacebook

Emergency Vehicle Accident Study (Year 1977)

Summary Information

This report examined emergency vehicle accident data rates before and after installation of emergency vehicle traffic signal preemption systems in St. Paul, Minnesota. In 1969, 28 signal preemption systems were installed as an electronic safety system designed to change traffic signals to green for emergency vehicle priority.

Between 1969 and 1976, the accident rate for emergency vehicles decreased by 70.8 percent. During this time period, the number of signalized intersections increased from 274 to 308, and the number of intersections with signal preemption grew from 28 to 285.

The following data was collected from 1962 through 1976.
 

YEAR
Number of Emergency Vehicle Accidents
Total Emergency Alarms
Number of Signalized Intersections
Number of Intersections With Preemption
1976
3
20,668
308
285
1975
5
20,061
308
-
1974
2
19,564
306
-
1973
2
13,109
306
252
1972
3
9,152
306
-
1971
4
8,989
297
211
1970
4
8,363
290
190
1969
6
8,300
274
28
1968
7
7,594
274
N/A
1967
8
7,495
267
N/A
1966
6
6,669
-
N/A
1965
2
5,321
-
N/A
1964
4
5,226
243
N/A
1963
1
5,096
227
N/A
1962
5
4,434
223
N/A

N/A = Not Applicable.
The author noted that emergency medical services were introduced in 1970, and that by 1976 emergency medical technicians (EMT) were making approximately 13,000 responses per year.

Emergency Vehicle Accident Study (Year 1977)

Emergency Vehicle Accident Study (Year 1977)
Publication Sort Date
08/19/1977
Author
Fire Chief, Department of Fire and Safety Services, St. Paul, MN
Publisher
Letter written by the Fire Chief of the Department of Fire and Safety Services
Goal Areas
Deployment Locations
Keywords