Nairobi Accident Map

February 17, 2017 elresor Road Users

Who gets in the most accidents?

accidents by user

The above graph shows the number accidents involving each type of road users. Note that some accidents involved more than one type of road user and thus could be counted more than once (N=1339).

Although private cars are the type of vehicle most often in an accident, when taking into account the number of people affected by a single accident, PSVs affect the most people because they carry the most. In the graph below a conservative estimate of five passengers is used to demonstrate the comparative effect of PSV accidents versus those involving other road users. estimated affected users

February 17, 2017March 22, 2017 elresor Time

Rush Hour

How does the time of day affect accidents? Not surprisingly, accidents follow other traffic patterns. In the morning peak (6 – 9 AM) concentrations are farther out (as everyone is coming into the center of the city), whereas in the evening peak (4 – 9 PM) accidents are more centered near the CBD.

Try turning on layers (one for morning, one for evening) one at a time so you can see the difference.

AM rush — AM Rush (6-9 AM): Accidents are clustered on the main roads leading into the city.

PM rush — PM Rush (4-9 PM): Accidents are focused in the center of the city.

February 17, 2017 elresor Time

When do most accidents occur?

accidents by hour

The above graph shows the total accidents (N=1,900) by the time they were first reported. Two clear peaks are evident during peak commuting (and traffic) hours.

The following graph shows that on average more accidents occur on Fridays and Saturdays.

accidents by day

February 17, 2017February 17, 2017 elresor All Accidents

Black Spots

nairobi black spots Through this heatmap it is possible to see the major black spots (areas with higher than average accident concentrations) in Nairobi. The darker the area the greater the number of accidents.

February 17, 2017March 22, 2017 elresor All Accidents, Time

Time-Lapse

This map shows all six months (May 2015 to October 2015) of accidents in Nairobi County. The time-lapse shows accidents by day, with new accidents layering on older ones to finally create a map of all six months of accidents.

February 17, 2017February 17, 2017 elresor All Accidents

Clustered Accidents

This map shows all 1324 accidents in Nairobi County clustered by proximity. Zoom in and out to see more or less detail.

February 17, 2017March 22, 2017 elresor All Accidents

Heatmap

This map shows the density of accidents in Nairobi County. Zoom in to see more detail.

February 17, 2017March 22, 2017 elresor All Accidents, Road Users

All Road Users

This map shows all accidents in Nairobi County by the type of road user involved. You can turn on and off layers to see different road users’ accidents. Note some accidents involved more than one type of road user and thus are represented more than once. Also, accidents in which the road user was not specified are not represented on this map (N=642).