Nairobi Safety Analysis Report


Safetipin, in partnership with the Nairobi City County, conducted safety audits in city of Nairobi supported by UN Habitat and Cities Alliance. 

Safetipin, is a map-based mobile phone and online application, which works to make communities and cities safer by providing safetyrelated information collected by users and by trained auditors. At the core of the app is the Women’s Safety Audit. A Women’s Safety Audit (WSA) is a participatory tool for collecting and assessing information about perceptions of urban safety in public spaces. The audit is based on nine parameters – Lighting, Openness, Visibility, Crowd, Security, Walkpath, Availability of Public Transport, Gender Diversity and Feeling.

The safety audits have been generated using two methods. First, manual audits were conducted by volunteers using the My Safetipin app at night. A total of 4,956 manual audits were conducted. Secondly, safety audits have been generated using the Safetipin Nite app. Uber taxis and local taxis of Nairobi were hired for this purpose. Mobile phones were mounted on the windshield and using the app photographs of the city roads were taken. These photographs were then assessed based on the eight audit parameters to generate audit pins at each location.

A total of 11,807 audit pins have been generated over 685 km of road length.


Safety Score

The Safety Score of a point is a reflection of the perception of safety at that particular location. For each audit point it is a number between 0 and 5, 0 being Poor i.e. Very Unsafe and 5 being Excellent in terms of overall safety.

The overall Safety Score for city of Nairobi is 3.1/5 i.e. Good.

Indicated in the pie chart is the percentage distribution of pins in each range. The Safety Score has also been indicated in the map below. Around 43% of the audit points were found to be safe whereas 22% of the points were rated poorly and needs improvement.

The parameters’ co-relation with the feeling of safety is indicated in the co-relation graph. From the manual safety audits, the parameters of Lighting, Openness and Gender Usage were found to contribute the most to the feeling of safety.

Parameter Ratings

Each of the nine parameters is rated 0/1/2/3, 0 being the poorest and 3 good. The average parameter ratings graph indicates the overall average rating for each parameter. Openness has been rated Above Average. Walkpath, Lighting and Public Transport have been rated Average. Visibility, Crowd, Security and Gender Usage have been rated Below Average. The overall Feeling of Safety for Nairobi City has been rated as Average.

The Parameter wise pin distribution graph indicates the number of points rated 0/1/2/3 i.e. the good points as positive and poor ratings as negative. The parameters of Security and Gender Usage have been rated poorly for most parts of the city followed by Visibility and Crowd. Lighting and Public Transport needs to be improved in some locations and the Walkpath conditions needs to be improved in few locations.

The Impact Bar Graph indicates the extent of influence and the relative impact that each parameter has on the perception of safety. Different parameters have different levels of impact on the perception of safety. The combined length indicates the impact potential of the parameter. The parameters with the maximum combined length have the highest impact on the perception of safety and vice versa i.e. The audits indicate that for Nairobi City, Lighting has the maximum impact and Transportation the least. The positive length (in green) indicates the extent of provision that has already been made on ground. The negative length (in red) indicates the (remaining) amount of improvement needed.

Gender Usage and Crowd are derived parameters i.e. improving the other parameters will result in a location being safer and hence more people, especially women using it at night. As seen from the bar graph Lighting, Visibility and Security parameters need to be improved followed by the Walkpath.

Parameter-wise pin distribution maps can be seen on the following pages.

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