Chip Ganassi Racing’s four-time IndyCar champion Scott Dixon says he expects IndyCar’s improved overhead cockpit protection will be introduced for 2018 and is more likely to take the form of a screen rather than a ‘halo’. Dixon, who explained to Motorsport.com last March his worries over driver sightlines on ovals while using a halo device, said that similar issues with Formula 1’s prototype halo designs are what had caused delays in the system’s introduction. He said: “You know, I know [IndyCar] are working hard on it. It's definitely a work in progress and obviously has been for quite some time.  I think we've seen with Formula 1, they've had a few snags that maybe they...
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