Also trucks are used in adverse environments. In the mining industry remote driven and more autonomous vehicles are already being rolled out:

http://www.itnews.com.au/News/296907,rio-tinto-prepares-mine...

The US military is also pushing remotely driven supply vehicles.

Then the next market is trucks on highways.

It's a bit like rail. People are obsessed with passenger rail but tend to ignore freight rail. For instance, how many people know that the US freight rail system is excellent?