Self-driving vehicle is not far in the future and they need to detect lanes of the roads accurately to have smooth ride for its user. Polylines annotation is required for in lane detection for such self-driving vehicles defining other vehicles, directions, direction of traffic and divergence for safe driving working on a stable computer vision model. Polylines helps in detecting lanes like streets or highways by labelling the lane marking by annotating lines on the object with great precision. Our team at Uniworld Outsourcing, is expert in drawing such lines and annotating images with good accuracy for creating stable and usable data.