You can buy this Instructor's training slide set of 130 slides for £50
Crossing sunken railway lines
Obstacles such as the sunken railway lines shown in the above slide are best crossed slowly and at an angle of 45°. The same argument also goes for similar obstructions such as rain gullies and the like. It should be noted that most forklift trucks will not safely negotiate a speed safety ramp,or “sleeping policeman” as the clearance at the bottom of the mast of the forklift is limited