# Uphill Section and Simulation of Speed limits |

Uphill and downhill gradients are examples of "flow-conserving bottlenecks". We implemented it by reducing the maximum ("desired") speed, especially of the trucks.

The resulting traffic breakdowns are similar to other types of bottlenecks like that of the On-Ramp and Lane-Closing scenarios representing non-flow-conserving and flow-conserving bottlenecks, respectively. Notice that here, in contrast to the Lane-Closing scenario, speed limits have no noticeable positive effect.