This is a diesel refueling platform which can also be used for replenishing fuel supplies on oil powered steam engines.
About this creation
The model was originally digitally built by Lazarus Bricks in 2013 and sold at his store on Bricklink. (It's still being sold today, and is available here: www.bricklink.com/store/home.page?p=lazarus992&itemID... ) I modified the design to have quite a bit newer parts, be a little longer and include a 60016 (Tanker Truck) MOD, among other things.
The platform has been extended to accommodate larger locomotives.
This truck is a 98% stock model of the tanker truck in set 60016. I replaced all spots where stickers would go with corresponding bricks of similar type.
The rear of the truck has a ladder to the roof-mounted fuel intake valves.