London Transport Routemaster Decals for Bus Simulator 21 is a free utility designed for Windows that enriches the gaming experience by providing a selection of authentic London Transport decals. This mod features commonly seen decals such as 'LONDON TRANSPORT', 'ROUTEMASTER', weight decals, depot address decals, emergency exit signs, and 'To Open' decals, as well as O-9 numbers in the official LRT font. These decals can be used on both single and double-decker buses, allowing players to recreate the iconic look of London's Routemasters.

The application is user-friendly, with a straightforward installation process. Users are advised to enlarge the decals initially to position them accurately on their buses before resizing them to the desired dimensions due to the game's editing limitations. The mod has undergone minor updates, including bug fixes and enhancements to ensure optimal performance. Overall, this utility is an excellent addition for enthusiasts of Bus Simulator 21 looking to customize their in-game vehicles.