In DoorZigt's view of the world of mobility, the first subject to be taken into consideration is the purpose, i.e. the transport of goods and passengers. Thereafter the modality, the traffic is to be considered as the means to realise the transport, which is qualified as useful or necessary.
In this way DoorZigt takes an opposing position in the world, where everybody is used to talk about traffic and transport.
Governmental organisations often are named Infrastructure, Traffic and Transport. Exactly in the wrong way of ordering, according to DoorZigt's judgement.
The explanation is rather simple: governmental organisations, just as many other organisations, count the amount of money involved. And indeed, in infrastructure huge volumes of money are being invested. But, whether the investment is the "best" one chosen, depends upon the vision on transport.
Therefore, the other way of ordering terms is not just of a symbolic nature, but the intention is to express a more fundamental apporach to the problems of mobility, starting from society needs.