It all started in 2016 with four second-hand traffic lights, a few signs, two dozen traffic cones and the belief that they could do a better job. Who do you call to deal with traffic when a sudden electrical fault means the local utility company needs to dig up the road? Or if you’re planning a concert and need to manage the flow of cars, trucks and people? If you’re in the south of the UK, it might be Keltic Traffic Management. Irishman Damien Kelly and his Australian wife Karla Kelly founded London-based Keltic TM in 2016 while working in…

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