31. As the area is not officially a park, there are few safety barriers in place to prevent falls into the gorge. 32. A portable tubular steel frame safety barrier sitting in the room is placed around the hole when a grate is removed. 33. The instrument will be connected, using approved wiring methods, back to a control panel in a non-hazardous area that contains safety barriers . 34. A safety barrier dividing the highway was ripped and lay across several lanes, suggesting at least one vehicle had torn through it. 35. Since around 2012 the terminal face has become too dangerous to approach, signs warn against crossing the safety barriers at the lookout. 36. Some of the rules were requiring constables to be uniformed when providing services, installing safety barriers in transport vehicles, and so on. 37. On 29 August, another incident occurred, when a Fairey Firefly landed without an arrestor hook and was stopped by the safety barrier . 38. In 1990, a movable concrete safety barrier was put in place to separate traffic heading in opposite directions and eliminate head-on accidents. 39. With twenty minutes remaining in the race, Max Nilsson went wide in Turn 9 and hit the safety barriers , retiring on the spot. 40. The remaining vehicles ( fleet numbers 531 604 ), were built between 1995 and 1997 and include AC propulsion and intercar safety barriers .