In 1975, the Diani beach road was built which bisected pristine coral rag forest. As development increased, vehicle traffic also increased and monkeys crossing the road become at risk for road injuries and mortalities. We have found that during the dry seasons, the numbers of individuals being hit by vehicles increases. We believe that the monkeys are crossing the road more often in the dry season as this is the time of reduced food availability and the monkeys need to increase their foraging areas and subsequently cross the road more often in search for food, water and sleeping sites.
Colobus Conservation works to reduce these statistics by painting speed bumps, building aerial ladders across the road and providing a general 'go slow' campaign.