Koyambedu Junction (Tamil: கோயம்பேடு சந்திப்பு) or otherwise called the Koyambedu Roundtana is an important road junction in Chennai, state of Tamil Nadu, India. It is located north of the Chennai Mofussil Bus Terminus at the junction of the Inner Ring Road and the Poonamallee High Road (NH4) in the Koyambedu area/ locality. The junction is a part of the Golden Quadrilateral project taken up under the National Highways Development Project.