The development of electronic driver aids began during the 1980s. Lotus began to develop a system of active suspension, which first appeared during 1982 on the Lotus 91. By 1987, this system had been perfected and was driven to victory by Ayrton Senna in the Monaco Grand Prix that year. In the early 1990s other teams followed suit and semi-automatic gearboxes and traction control were a natural progression. The FIA, due to complaints that technology was determining the outcome of races more than driver skill, banned many such aids for . This resulted in cars that were previously dependent on electronic aids becoming very "twitchy" and difficult to drive (particularly the Williams FW16). Many observers felt the ban on driver aids was in name only as they "proved difficult to police effectively".