Major Contributing Factors

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Phyllis Lawson
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1 Major Contributing Factors Contents: Page Figure 3.1 Major Contributing Factors by Collision Severity Major Contributing Factors in Collisions by Road System 19 Table 3.1 Top 10 Contributory Factors in Fatal Collisions All Major Contributing Factors in Fatal Collisions Count of Factors by Severity Count of Action Factors by Severity Count of Factors by Severity Count of Factors by Severity Count of Factors by Road System Count of Action Factors by Road System Count of Factors by Road System Count of Factors by Road System 19 13

2 Major Contributing Factors Contributing factors are those circumstances or factors that have directly contributed to the collision or its severity. TAIS recognizes that a collision usually results from many causal factors. The collision data system accepts up to four contributing factors for each vehicle involved in a collision. Factors can be selected from four categories: human condition, human action, vehicle condition, and driving environment. In traffic collisions reported by police agencies, the causal factors are assigned by the investigating officer. Incidents reported through SGI s Dial-A-Claim are assigned causal factors only if they are clearly identified in the drivers statements. The causal factors in property damage only collisions are therefore much more subjective in nature and not directly comparable to previous years and casualty collisions. This section summarizes all contributing factors that were reported. In 2015, a total of 38,544 factors contributed to 27,870 collisions. With the exception of Table 3.1, the numbers in following tables and figures represent the number of occurrences of each factor. Figure 3.1 shows that human condition is a more prevalent factor in fatal collisions (48%) than in all collisions (25%). condition and human action account for 62% of all factors in collisions, as compared to 87% of factors in fatal crashes. Figure 3.2 summarizes the factors by road system. factors contribute to 81% of urban collisions, while environmental conditions, mainly animal actions, are more prevalent in rural and highway collisions (63% and 69%). Top 10 Contributory Factors in Fatal Collisions During 2015 Driver// Factors Urban Streets Provincial Highways Table 3.1 Rural Roads Other Total % of Total Alcohol Involvement Distracted Driving Speed-Related Other Action Driving Too Fast for s Fail to Yield/Traffic Control Disregarded Following Too Closely Other s Careless Driving/Stunting Driver Inexperience/Confusion * A collision can have a maximum of four contributing factors for each vehicle involved. 1 Alcohol involvement collisions involve drivers who have been coded as Had Been Drinking or Impaired. 2 Distracted driving collisions involve drivers who have been coded as Inattentive or Distracted. 3 Speed-related collisions involve drivers who have been coded as Driving Too Fast for Road s or Exceeding the Speed Limit. 14

3 All Major Contributing Factors In 2015 Fatal Collisions Table 3.2 Urban Provincial Rural Driver// Factors Streets Highways Roads Other Total % of Total Alcohol Involvement Distracted Driving Speed-Related Other Action Driving Too Fast for s Fail to Yield/Traffic Control Disregarded Following Too Closely Other s Careless Driving/Stunting Driver Inexperience/Confusion Pedestrian Action Contributed Weather s Passing or Improper Lane Usage Drugs (Prescription or Illegal) Taking Evasive Action Animal Action (Wild) Other Lost Consciousness/Other Illness Fell Asleep Snow Drift View Obstructed/Limited Physical/Medical Disability Defective Tires/Tire Blowout Other /Defect Lane Marking Inadequate Defective Exhaust System Extreme Fatigue Turning Improperly Alcohol involvement collisions involve drivers who have been coded as Had Been Drinking or Impaired. 2 Distracted driving collisions involve drivers who have been coded as Inattentive or Distracted. 3 Speed-related collisions involve drivers who have been coded as Driving Too Fast for Road s or Exceeding the Speed Limit'. 15

Major Contributing Factors by Collision Severity Figure 3.

3 Damage Injury Fatal Total Factors Driver Inattention 4,666 316 29 5,011 13.0 Driver Inexperience/Confusion 701 271 6 978 2.5 Driver Distraction 996 287 4 1,287 3.

3 Drugs (Prescription or Illegal) 48 19 2 69 0.2 Lost Consciousness/Other Illness 43 39 2 84 0.2 Physical/Medical Disability 52 28 0 80 0.2 Defective Eyesight/Hearing 12 5 0 17 0.

3 Following Too Closely 1,219 880 0 2,099 5.4 Driving Too Fast for s 1,161 387 17 1,565 4.1 Taking Evasive Action 855 251 2 1,108 2.

4 Major Contributing Factors by Collision Severity Figure 3.1 Action 39% Fatal Collisions 12% 1% Action 48% Injury Collisions 29% 48% All Collisions 21% 2% Action 37% 36% 25% 2% Count of Factors by Severity Table 3.3 Damage Injury Fatal Total Factors Driver Inattention 4, , Driver Inexperience/Confusion Driver Distraction , Driving While Impaired Had Been Drinking Other s Fell Asleep Extreme Fatigue Drugs (Prescription or Illegal) Lost Consciousness/Other Illness Physical/Medical Disability Defective Eyesight/Hearing Total 8,146 1, , Count of Action Factors by Severity Table 3.4 Action Damage Injury Fatal Total Factors Fail to Yield 2, , Following Too Closely 1, , Driving Too Fast for s 1, , Taking Evasive Action , Traffic Control Device Disregarded , Other Action 1, , Passing or Improper Lane Usage , Backing Unsafely Turning Improperly Careless Driving/Stunting Exceeding Speed Limit Pedestrian Action Contributed Fail to Signal Driving Wrong Way in One Way Traffic Total 10,539 3, ,

5 Count of Factors by Severity Table 3.5 Damage Injury Fatal Total Factors Other /Defect Defective Tires/Tire Blowout Jackknife/Trailer Swing Defective Brakes Overloaded/Improperly Loaded View from Obstructed Load Shifted/Spilled Defective Suspension/Wheel Failure Defective Steering Defective Engine/Power Train/Wiring Defective Lights Lights Not On Defective Exhaust System Total Count of Factors by Severity Table 3.6 Damage Injury Fatal Total Factors Road (Surface or Structure) 3, , Animal Action (Wild) 5, , Weather s Uninvolved View Obstructed/Limited Other Excessive Loose Gravel Snow Drift Sun Glare Uninvolved Pedestrian Animal Action (Domestic) Obstruction/Debris on Road Construction Zone Soft or Defective Shoulder Traffic Control Device Not Working Lane Marking Inadequate Total 11,529 2, ,

6 Count of Factors by Road System Table 3.7 Streets Highways Roads Other Total Factors Driver Inattention 4, , Driver Inexperience/Confusion Driver Distraction 1, , Driving While Impaired Had Been Drinking Other s Fell Asleep Extreme Fatigue Drugs (Prescription or Illegal) Lost Consciousness/Other Illness Physical/Medical Disability Defective Eyesight/Hearing Total 7,812 1, , Count of Action Factors by Road System Table 3.8 Action Streets Highways Roads Other Total Factors Fail to Yield 2, , Following Too Closely 1, , Driving Too Fast for s 1, , Taking Evasive Action , Traffic Control Device Disregarded 1, , Other Action 1, , Passing or Improper Lane Usage , Backing Unsafely Turning Improperly Careless Driving/Stunting Exceeding Speed Limit Pedestrian Action Contributed Fail to Signal Driving Wrong Way in One Way Traffic Total 11,784 1, , Count of Factors by Road System Table 3.9 Streets Highways Roads Other Total Factors Other /Defect Defective Tires/Tire Blowout Overloaded/Improperly Loaded Jackknife/Trailer Swing Defective Brakes View from Obstructed Load Shifted/Spilled Defective Suspension/Wheel Failure Defective Steering Defective Engine/Power Train/Wiring Lights Not On Defective Lights Defective Exhaust System Total

8 Animal Action (Wild) 150 4,050 942 243 5,385 14.0 Weather s 296 481 103 37 917 2.4 Uninvolved 511 295 53 31 890 2.

7 Snow Drift 73 88 47 5 213 0.6 Sun Glare 147 33 15 6 201 0.5 Uninvolved Pedestrian 157 2 2 0 161 0.

6 Construction Zone 71 31 17 9 128 0.3 Soft or Defective Shoulder 8 32 47 9 96 0.

7 Count of Factors by Road System Table 3.10 Streets Highways Roads Other Total Factors Road (Surface or Structure) 2, , Animal Action (Wild) 150 4, , Weather s Uninvolved View Obstructed/Limited Other Excessive Loose Gravel Snow Drift Sun Glare Uninvolved Pedestrian Animal Action (Domestic) Obstruction/Debris on Road Construction Zone Soft or Defective Shoulder Traffic Control Device Not Working Lane Marking Inadequate Total 4,357 6,418 2, , Major Contributing Factors in Collisions by Road System Figure 3.2 Urban Streets Provincial Highways Action 49% 18% 1% 3% 13% Action 15% 32% 69% Rural Roads Other Roads 63% 16% Action 23% Action 20% 3% 15% 2% 58% 19

2012 Saskatchewan Traffic Accident Facts

2012 Saskatchewan Traffic Accident Facts The statistics in this report have been updated as of January, 2015 2012 QUICK FACTS 2012 compared to 2011) 2011 2012 % CHANGE Property Damage Only Collisions 24,372