The Use of GIS in the Spatial Distribution of Speed Bumps within Afikpo

Abstract

Speed bumps (also called speed breakers, or a sleeping policeman) are the common name for a family of traffic calming devices that use vertical deflection to slow motor-vehicle traffic in order to improve pedestrian’s safety. However, Speed bumps often meet resistance from residents and road users because of their discomforting nature arising from unlawful and indiscriminate installation/construction by zealous individuals. The aim of this study is to map out the speed bumps within Afikpo using GIS as a tool with a view to providing a guide (especially to visitors) on best alternative route to adopt. To produce the map, the coordinates of the speed bumps acquired using a handheld global positioning system (GPS) receiver were plotted on a georeferenced map  covering the study area using ArcGIS 9.3 software. The result of this study revealed that speed bumps within Afikpo have their shapes, sizes, and height to be too inconsistent. The map produced will therefore be a useful guide to the populace (especially visitors) informing them of spots to expect speed bumps (and therefore to be more careful especially as there are no traffic signs around) and also, routes to avoid in cases of emergencies so as not to increase the response time of emergency. There is therefore the need for regular and increased education on the variety of speed bumps, their roles, standards, and rational for their installation in addition to the need to shun illegal installation or use of sub-standard or alternate materials such as woods by communities. Further Studies should be carried out to assess the level of compliance with laws guiding the installation of speed bumps and to be able to identify installations that fall short of standard. This will help to draw the attention of the authorities towards the removal of such illegal or substandard installations.