The BBC reports:
Network Rail is transporting 200 staff by coach from Reading to Coventry for a conference because of the high cost of train tickets, it has emerged.
The rail operator has opted to shun train travel for road transport as it is more than £24,000 cheaper.
If open return tickets were bought for all the staff it could cost up to £27,000 - £135 each. But coach travel, at £12 a head, will cost just £2,400.
The firm said it made no apologies for getting the "best value" for taxpayers.
Network Rail said it looks at cheaper options for journeys as part of cost-cutting, as its workers do not get free travel or discounts.
A spokesman added: "Whilst we have no role in setting train fares, we use rail for the overwhelming number of business journeys.
"Occasionally, if there is a cheaper alternative, we will use that."