Yellow flag, Circuit de Catalunya, 2017 Link to this image full-size: https://www.racefans.net/2018/06/13/why-f1s-yellow-flag-drs-restrictions-have-been-eased/motor-racing-formula-one-world-championship-spanish-grand-prix-preparation-day-barcelona-spain-193/Yellow flag, Circuit de Catalunya, 2017Advert | Become a RaceFans supporter and go ad-free