Of the teams that did appear, all had completely new chassis to cope with the revised Technical Regulations, which stipulated a variety of changes including the reduction of engine capacity and the size of aerodynamic wings, the introduction of more stringent crash testing, the raising of the cars' ride height, and more rigorous testing of fuel specifications all with the aim of reducing speeds and increasing driver safety, a process which had begun in the aftermath of the deaths of Roland Ratzenberger and Ayrton Senna during the weekend of the 1994 San Marino Grand Prix. The cars were still in various stages of development heading into the new season; the Footwork FA16 and Simtek S951 chassis arrived at the event with virtually no testing, having been completed shortly beforehand. There was one new team in the shape of the Italian Forti outfit, whilst the Benetton, McLaren, Footwork, Jordan, Pacific, Ligier and Sauber teams had all changed their engine suppliers in the course of the off-season. The biggest change perhaps was made by Benetton, who after running Fords joined Williams as a Renault powered team. However, McLaren’s long term relationship with Mercedes was established in 1995 and would continue until 2014.