Dreyer, C.M.W. (Catharine Maria Willemien)Steyn, Wynand Jacobus Van der Merwe2016-02-232016-02-232015-09Dreyer CMW, Steyn WJvdM. Evaluation of the effect of deteriorating riding quality on bus–pavement interaction. J. S. Afr. Inst. Civ. Eng. 2015;57(3), Art. #1116, 7 pages. http://dx.DOI.org/ 10.17159/2309-8775/2015/v57n3a1.1021-201910.17159/2309-8775/2015/v57n3a1http://hdl.handle.net/2263/51499Deteriorating riding quality has a negative impact not only on infrastructure, but on the road user as well. Road users experience higher vehicle operating costs (VOCs), longer travel times, congestion and uncomfortable rides, to name a few. The purpose of this paper is to demonstrate the link between deteriorating riding quality and high vertical accelerations (awz) and VOCs for a bi-articulated bus on an identified bus route with different responsible road authorities in rural Mpumalanga, South Africa. The link, as identified, indicated that the speed the bus travelled played a big role in the generation of awz. Recommendations for future research are also proposed.enSouth African Institution of Civil EngineeringVertical accelerationsRiding qualityBi-articulated busRoad conditionsMaintenanceVehicle operating costs (VOCs)Engineering, built environment and information technology articles SDG-09SDG-09: Industry, innovation and infrastructureArticle