The Avenue Verte/Greenway is a joint Anglo-French initiative assisted by Europe, to develop a largely traffic-free route between Paris and London (via the Dieppe – Newhaven ferry) for cyclists, walkers and horse riders. A route was put in place in time for the 2012 London Olympic Games. The route is not yet finalised and several sections are noted on the Avenue Verte website as being temporary.
In England, the route would follow the National Cycle Network (NCN) Route 21 between London and the South Coast. In East Sussex, the Avenue Verte incorporates existing paths including the Cuckoo Trail and Forest Way, offering more than 30 km of traffic-free cycling, walking and horse riding along former railway lines.
The majority of the route on the English side is unpaved and in parts in so poor condition that it is not suitable for roadbikes, instead a hybrid or MTB is recommended.
In France, the Avenue Verte follows the former Dieppe to Paris railway for 40 km. It currently starts just outside Dieppe at Arques-la-Bataille and stops again just outside Forges-les-Eaux but once complete, the route will extend to Paris almost entirely on traffic-free routes.
Directions: Leaving the ferry terminal at Dieppe, head towards the town centre. At the harbour bridge you will see signs for Avenue Verte and D1.
This page in French is excellent for the French side http://fr.wikipedia.org/wiki/Avenue_verte