Motorists are being warned to be extra vigilant over a wave of varying 'crash-for-cash' scams deployed in different parts of the country, as fraudsters look to new tactics to force innocent drivers into colliding with them.Deliberate crashes caused by scam artists who want to claim compensation by blaming faultless motorists remain a major concern on our roads, the Insurance Fraud Bureau says.But while suddenly slamming on the brakes in the path of innocent drivers to trigger collisions remains the most common technique, the IFB says it has identified different methods fraudsters are using in specific regions.Among these is what the bureau dubs the 'roundabout trap'. This sees scammers deliberately moving into the wrong lane at busy roundabouts to cause a collision.The IFB says it has seen a growing trend for this manoeuvre specifically in Dagenham in east London.Meanwhile, in the West Midlands – particularly in popular restaurant and nightlife hotspots in Birmingham – fraudsters are deploying what's called the 'side road setup'.This is when scammers signal to drivers to pull out of side roads where the Highway Code dictates they do not have right of way. When they oblige, the fraudster purposely drives into the side of them and claims the other party was at fault.