Investing in construction, utilisation and road pricing will not be enough to improve mobility in the Randstad, the highly urbanised western part of the Netherlands. Extra capacity on roads and railways may eliminate or relieve well-known bottlenecks, but will not automatically make the traffic and transport network less vulnerable to disruptions. That is why the Advisory Council for Transport, Public Works and Water Management advocates making road and rail networks more robust so that they can cope with disruptions. This is achievable by such means as buffers, diversions, faster accident cleanups and provision of alternative modes of transport. This document puts forward recommendations for robust networks and suggestions for policy and governance with a view to tackling sensitivity to incidents.