GH

Uranium: Red Hot Yellow Cake

Apart from - potentially, if a whole lot of laws change - ships, how do you see nuclear power replacing "fossil fuels powering the vehicle fleet" ?

The only ways I can see are indirect:
(1) use nuclear-generated electricity to produce hydrogen or cellulosic-based ethanol. Both those would require replacing most vehicles' engines.
(2) use nuclear-generated electricity to charge the batteries of electric vehicles. This would again require replacing the vehicles. If we're going to do this, we might as well use sustainable power sources with no toxic side products: wind, wave, and solar.