Formula 1
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develop a system of active suspension which first appeared in 1982 on the F1 Lotus 91 and Lotus Esprit road car. 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 1994. This led to cars that were previously dependent on electronic aids becoming very "twitchy" and difficult to drive (notably the Williams FW16), and many observers felt the ban on driver aids was in name only as they "have proved difficult to police effectively". The teams signed a second Concorde Agreement in 1992 and a third in 1997, which expired on the last day of 2007.
On the track, the McLaren and Williams teams dominated the 1980s and 1990s, with Brabham also being competitive in the early part of the 1980s, winning two drivers' championships with Nelson Piquet. Powered by Porsche, Honda, and Mercedes-Benz, McLaren won sixteen championships (seven constructors', nine drivers') in that period, while Williams used engines from Ford, Honda, and Renault to also win sixteen titles (nine constructors', seven drivers'). The rivalry between racing legends Ayrton Senna and Alain Prost became F1's central focus in 1988, and continued until Prost retired at the end of 1993. Senna died at the 1994 San Marino Grand Prix after crashing into a wall on the exit of the notorious curve Tamburello, having taken over Prost's lead drive at Williams that year. The FIA worked to improve the sport's safety standards since that weekend, during which Roland Ratzenberger also lost his life in an accident during Saturday qualifying. No driver has died on the track at the wheel of a Formula One car since, though two track marshals have lost their lives, one at the 2000 Italian Grand Prix, and the other at the 2001 Australian Grand Prix. Since the deaths of Ayrton Senna and Roland Ratzenberger, the FIA has used safety as a reason to impose rule changes which otherwise, under the Concorde Agreement, would have had to be agreed upon by all the teams — most notably the changes introduced for 1998. This so called 'narrow track' era resulted in cars with smaller rear tyres, a narrower track overall and the introduction of 'grooved' tyres to reduce mechanical grip. There would be four grooves, on the