The choice of 'Any', 'Paved' or 'Gravel' is helpful to a point. 'Paved' is useful in that Google street map helps me to view the suggested route to decide on places to visit and places to avoid. The obvious downside cannot detect the volume and speed of motor vehicles. 'Gravel' is useful despite that drawback of not always being pre-viewable. On occasions the 'Gravel' route has taken me along pathways that are barely passable due to overgrown vegetation or debris that heightens the risk of punctures. Would the opportunity to highlight the quality of gravel paths help to inform future travellers what is unsuitable for a road bike or will be ideal for a mountain bike? if so I wonder if the gravel option could be coded in some way to help the decision making process of riders and the types of bikes the ride.Any thoughts?