Belgian Grand Prix venue Spa Francorchamps has reintroduced gravel traps around areas of the circuit as it continues its safety developments.
Spa has endured significant criticism in recent years following a number of major incidents that raised safety concerns.
In a bid to address the comments and to allow for bike racing, including the 24-hour Spa EWC Motos later this year, the circuit must hold an FIM Grade C licence, the requirements of which are different to those of the FIA.
Improvements are being made at a number of corners, including La Source, Les Combes, Malmedy, Bruxelles, Blanchimont and the Bus Stop chicane.
The latest photographic update from the circuit highlights changes being made at Pouhon, where the existing asphalt run-off has been replaced largely with gravel.
F1 will return to Spa in August after failing to complete a full-speed racing lap in 2021, with half-points awarded for drivers lapping briefly behind the safety car.