there is usually a separate facility. For example, the Western Scheldt Tunnel is not accessible for pedestrians, cyclists or moped riders. They have to use the ferry at another location, or take the bus through the tunnel. Unlike the vast majority of bus services in the Netherlands, three services that cross this tunnel carry bicycles and mopeds. There is a fee for this service and reservation is recommended. Pedestrians use the pavement where one is available, otherwise they use the same position on the road as the cyclists: on the cycleway or lane if available, otherwise on the road (but in the latter case pedestrians preferably walk on the left, while cyclists go on the right). Roads and tunnels accessible for cyclists are also accessible for pedestrians. Most pedestrian paths are available to cyclists who dismount and walk the bike. Separate bike paths, parallel to the roadway When enough space is available, larger roads are fitted with a parallel fietspad (bike path) that is physically separated — for example by means of a verge, hedge, or parking lane — from the roadway. In most cases, these bike paths are also physically separated from an adjacent footpath. Where protected bike paths exist, their use is in most cases obligatory for cyclists. Mopeds, mofas and the like are allowed and obliged to use them when their maximum speed is no more than 25 km/h (with a blue license plate) (though this has become controversial). When the maximum speed is 45 km/h (yellow license plate), mopeds are only allowed to use the cycle paths if that is indicated (mostly outside of the built-up area). Motorists are not allowed on bike paths, and to enforce this the entry of cars is often made physically impossible by using obstacles. In any case, a single-directional bike path is usually too narrow for cars to travel on. Bi-directional bike paths on one side of the road are common in towns as well as in the countryside: they are divided into two lanes, similar to roads, by a dashed line. Occasionally bi-directional cycle ways exist on both sides of the road; this reduces the number of times cyclists have to cross the road. The color of the pavement on a bike lane or path may vary, though red is the standard color to identify bike paths and on-road bike lanes in the Netherlands: either red asphalt or brickwork