If your course has a ditch or small stream, you can use a bridge to cross these. The width of any bridge on course should not be narrower than other portions of the course so riders can safely cross. Flyovers can also be useful to create a course in an area that is otherwise difficult to design a loop. These are elevated bridges used to cross over another section of the course. Flyovers can be used for spectator access to an inside portion of a course loop that would otherwise require crosswalks, and can also permit two sections of the course to cross – as is often needed when designing a course in a challenging venue.
Two design options include the run-up/ride-down and the ride-up/ride-down.
The run-up/ride-down has stairs on the entrance side with a ramp on the exit side. It can compensate for a course that has limited dismounts or running sections. Keep in mind that stairs are strictly regulated by building codes, and you should contact your local authority to learn more.
Ride-up/ride-down has a ramp on both the entrance and exit sides. The angle of the ramps should not be so severe that it is difficult for riders of all skill levels to ascend safely.
Both designs should have sufficient length across the top to permit a safe remount prior to descending.
Though temporary structures, they still need to support considerable weight as well as conform to all local safety standards of other off-the-ground structures – including the use of guardrails or handrails. Before construction of any of these structures, you should check local ordinances and building codes, and employ the services of a qualified carpenter. Additions such as non-slip paint or non-slip strips should be considered. These features should not be added at the expense of safety.