Real-time vehicle detection is a technology employed in applications like selfdriving cars, traffic camera surveillance. Every year we see better and updated stateof-the-art (SOTA) object detectors, but as those are trained on general-purpose datasets (like MS COCO), we miss out on targeted model improvements for vehicular data. The aim of this paper is to improve the newly released, YOLOv4 detector, specifically, for vehicle tracking applications using some existing methods such as optimising anchor box predictions by using k-means clustering. We also carefully hand-pick and verify some key techniques mentioned in the original paper, to optimise YOLOv4 as per the requirements of our dataset (UA-DETRAC).