(not-comparable) UK, Australia, New Zealand, and South Africa standard spelling of aging.
These two events have exposed the road haulage industry as being reliant on a poorly paid and ageing workforce, dependent on employees recruited from low-wage countries in Europe. 2021 October 20, Industry Insider, “The wheels turn slowly”, in RAIL, number 942, page 68:
"The Tees Valley has ageing diesel trains that predate any form of emission control. 2020 May 20, Paul Clifton, “A hydrogen solution to decarbonisation?”, in RAIL, page 54: