Learn French: Tu devrais utiliser notre nouveau réseau de transport. - You should use our new transport network.

Il faut que expresses a strong necessity ("you must" or "it is necessary that") and triggers the subjunctive: Il faut que tu utilises... In contrast, Tu devrais is the conditional tense of devoir. It translates to "You should", offering advice rather than a strict obligation. Because it is a standard conjugated modal verb, it is simply followed by the infinitive utiliser, no subjunctive needed!

Why do we use the conditional devrais here instead of the present tense dois?

Using the present tense Tu dois means "You must" or "You have to". By putting devoir into the conditional tense (Tu devrais), it softens the statement to "You should" or "You ought to". It is the standard way to politely give a recommendation in French.

I noticed nouveau comes before réseau. Do not most French adjectives go after the noun?

Yes, but nouveau is an exception. A small group of common adjectives describing Beauty, Age, Number, Goodness, or Size (often remembered by the acronym BANGS) are placed before the noun. Since nouveau describes age or newness, it goes right before réseau.

Why is it réseau de transport instead of réseau du transport?