Since his death, IndyCar drivers have called for studies on how to improve the safety barriers.
Birmingham Crown Court heard Adrian Maund, 43, from Caswell Crescent, Leominster, had raised safety barriers shortly before the crash.
Safety barriers and fencing will offer protection to wildlife and workers during construction and after the road is completed.
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Still, given the recent deaths, the MTA is being urged to try a more elaborate and expensive option: glass safety barriers.
They had died, the inquiry decided, from asphyxiation or suffocation in the crush which left steel safety barriers buckled and broken.
After the event, work began to clear the tonnes of rubbish and remove the safety barriers, stages, scaffolding and giant screens.
The crash is said to have happened on a high section of the road at a location that has no safety barriers.
Jane Harding, 52, was killed when the car she was in was struck at Moreton-on-Lugg, Herefordshire, in January 2010, after the safety barriers had been raised.
Severely restricted turnstiles, poor conditions on the terraces and inadequate safety barriers with virtually no means of escape all contributed to the deadly crush, the panel found.
The metamorphosis, overseen by the Automobile Club de Monaco (ACM), takes two months to complete and calls on the expertise of 200 construction workers to build 1, 100 tonnes of grandstands, 900 tonnes of pit garages and 21 miles of safety barriers.
He told BBC Scotland that safety measures, such as barriers, at the crossing could have saved the lives of his parents and uncle.
The major pharmas, however, have large quality programs that are highly integrated into their operations, serving as robust barriers and responsive safety nets against such disasters.
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The company says at those crossings it cannot close, it intends to boost safety by building footbridges, adding new barriers and using new technology.
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He said it had been previously suggested that barbed wire or barriers could be erected as a safety measure.
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They include getting rid of non-tariff barriers (eg, by harmonising food-safety rules) and allowing free trade in services and government purchases, as well as eliminating the many exceptions to the common tariff.
Mr Harlock, from Woolstone, said he joined Mouchel Business Services in mid-2008 and by the autumn he was finding "a lot of safety defects" including in "many cases", crash barriers not properly secured to the bridges.
But scientists, many environmentalists, companies and policymakers are united in recognising the potential safety and efficacy of this technology at well selected and regulated sites, the barriers to which are chiefly economic.
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