ROADWATCH KENYA
Crash mechanics

Why crashes happen

CAUSES

Most deaths are not accidents in the random sense. They follow repeatable chains: a vehicle class, a behaviour, a road condition, an outcome.

Filter the dataset

1,370 of 1,370 records

Sankey

Cause to consequence

Four stages: road defect, driver behaviour, collision type and injury severity.

ROAD CONDITIONBEHAVIOURCOLLISIONSEVERITYNo defect recordedPotholeLack of signageFaded road markingsMissing speed bumpsSlippery oil spillSpeedingOvertaking improperlyNo violation recordedLane splittingDistracted drivingDriving under the influencePedestrian knock-downRear-end shuntT-bone/Side impactSingle-vehicle incidentHit-and-runHead-on collisionOtherFatality/DeathSerious Injury/HospitalisedMinor/Slight Injury
Pareto

The vital few

Bars are crash counts, the line is cumulative share.

Treemap

Collision types by volume

Pedestrian knock-down310Pedestrian knock-down: 310Rear-end shunt217Rear-end shunt: 217T-bone/Side impact211T-bone/Side impact: 211Single-vehicle incide…195Single-vehicle incident: 195Hit-and-run182Hit-and-run: 182Head-on collision170Head-on collision: 170Multiple-vehicle pileup: 85
Infrastructure

Road defects recorded

  • measured in crashes
Vehicle condition

Mechanical faults

  • measured in deaths
Cross-tab

Behaviour × collision type

Head-on collision
Hit-and-run
Multiple-vehicle pileup
Pedestrian knock-down
Rear-end shunt
Single-vehicle incident
T-bone/Side impact
Speeding
55
54
29
91
69
68
73
Overtaking improperly
24
35
15
57
38
31
33
No violation recorded
30
21
6
47
31
34
21
Lane splitting
25
20
13
41
24
23
34
Distracted driving
14
24
11
45
28
23
29
Driving under the influence
22
28
11
29
27
16
21
Cross-tab

Road defect × visibility

Clear
Complete darkness/Unlit road
Heavy rain
Smoke/Dust
Thick fog
No defect recorded
303
214
78
32
34
Pothole
86
68
20
6
7
Lack of signage
70
55
22
6
9
Faded road markings
69
65
12
5
10
Missing speed bumps
58
50
11
4
12
Slippery oil spill
35
17
6
1
5