An open meeting will be held in Warwick Bridge on plans to divert heavy traffic away from the village.
The proposals would see the A689 diverting traffic away from the A69 at Brampton.
Campaigners say the A689 is a straighter wider road that doesn't pass through any centres of population.
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Sandy Murray, of Police Scotland, was was giving evidence at the trial of a bus driver who denies killing Ryan Baird by dangerous driving.
34-year-old Christopher Peck was involved in a head-on crash with a drunk driver. His funeral has taken place in his hometown, Workington.
The arrests come weeks after a much-publicised series of appeals to mark the 30th anniversary of the 18-year-old's death.