Hot Routes - developing a technique for the spatial analysis of bus crime in London

With Naomi Shepherd (TfL). National Crime Mapping Conference, Manchester.

Transcript

1. Hot Routes Developing a Technique for the Spatial Analysis of Bus Crime in London Naomi Shepherd and Henry Partridge Community Safety, Enforcement and Policing Transport for London
2. Introduction • Transport for London - Community Safety, Enforcement and Policing • Method of mapping crime along a bus route • Can assist in strategic and tactical policing • Current focus on policing buses • Pilot method - currently under development
3. Presentation Structure • What are Hot Routes? • How are they created? • Problems addressed • A worked example • Strengths and benefits • Going forward
4. • Represents the linear distribution and density of incidents by thematically shading sections of road • Different to other thematic and hotspot mapping techniques • An additional method for visualising crime in an area What are Hot Routes?
5. The Process OS Mastermap
6. 250m CAD reference grid squares
7. Match incidents to road section Weight incidents by length of road section
8. Weighting incidents - browser view Map Table Crime Data
9. Shade thematically
10. Format for final view
11. Problems Addressed • Roads with central reservation • Unequal lengths of the road sections • More than one section of the same road in a CAD grid square • Road sections spanning 3 CAD squares
12. Bus route Hotspots Hot routes Priority Location
14. Strengths and Benefits • Respects underlying geography • Uses a weighted measure • Represents incidents as a linear pattern
15. Further Development • Accuracy of data – look up list for common locations • Use a weighted measure for incidents assigned to a road rather than a precise location • Area rather than route analysis – weight for frequency of buses / passenger volumes
16. Further Application • Comparison of bus crime with general crime in the surrounding area • Monitoring of displacement and diffusion of benefit • Application not limited to bus related crime – theft from motor vehicles
17. Questions? Naomi Shepherd – naomi.shepherd@tfl.gov.uk Henry Partridge – henry.partridge@tfl.gov.uk