The infographic above (fifth in the series, and just a few days early) shows solar car teams that are likely to be entering in the World Solar Challenge this October, with my estimate of reported current progress (on a red–amber–green scale), taking into account recent social media updates. The team list has also been updated, and has a simpler traffic-light version ( 
) of these estimates, together with more detailed news.
As well as building a new car, Principia are gearing up to race an old one at the FSGP in July, so they must be rather busy. Bochum continues to blog in German, and report that they are using plexiglas for the windows of their new car. Nuon have announced that their new car will have an autopilot (OK, that last one was an April Fool’s joke).
In general, teams should be well into construction by now. For some teams, I have seen no evidence that this is the case (which may simply mean that they are too busy to post). However, best of luck to all the teams!
Scientific Gems 
That autopilot post was an April 1st joke. Check the date.
Indeed it was. I’m glad somebody’s paying attention.
On second thoughts, the explanatory video I linked to was in Dutch, so perhaps I should edit my post…