Here are the World Solar Challenge GPS positions as at 08:54 Wednesday October 21 (Darwin time) – Day 4 of the race.
Calculated road distances below are approximate, based on interpolation between the known road distances to control stops. The second road distance shown (in grey) is adjusted to compensate for GPS delays. Current big news is the Punch penalty (see their social media for their side of the story) and the Cruiser class rules, which were apparently being tweaked last night. See the tracker page, timing board, and social media for continued updates.
| 21 | Twente  (Red One, Challenger)         |
14 km behind Nuon | 92 km/h | (Adjusted 2199 km from Darwin) |
| 3 | Nuon (Nuna8, Challenger) |
Approx 2192 km from Darwin | 92 km/h | (4 km behind Twente) |
| 2 | Michigan  (Aurum, Challenger)  |
14 km behind Nuon | 92 km/h | (10 km behind Twente) |
| 10 | Tokai  (Tokai Challenger, Challenger) |
33 km behind Nuon | 89 km/h | (29 km behind Twente) |
| 8 | Punch  (Punch One, Challenger) |
52 km behind Nuon | 88 km/h | (48 km behind Twente) |
| 16 | Stanford (Arctan, Challenger)  |
156 km behind Nuon | 83 km/h | (161 km behind Twente) |
| 23 | Kecskemét  (MegaLux, Challenger) |
205 km behind Nuon | 82 km/h | (207 km behind Twente) |
| 30 | Arrow  (Arrow1-GT, Challenger) |
305 km behind Nuon | 77 km/h | (308 km behind Twente) |
| 5 | EAFIT  (Primavera, Challenger) |
388 km behind Nuon | 74 km/h | (387 km behind Twente) |
| 13 | Western Sydney (Unlimited, Challenger)  |
408 km behind Nuon | 73 km/h | (414 km behind Twente) |
| 77 | Blue Sky  (Horizon, Challenger) |
461 km behind Nuon | 70 km/h | (461 km behind Twente) |
| 14 | UKZN  (Hulamin, Challenger) |
466 km behind Nuon | 70 km/h | (462 km behind Twente) |
| 17 | NWU (Sirius X25, Challenger) |
471 km behind Nuon | 70 km/h | (Trailered) |
| 25 | Goko (Musoushin, Challenger) |
558 km behind Nuon | 66 km/h | (562 km behind Twente) |
| 46 | JU  (Solbritt, Challenger) |
562 km behind Nuon | 66 km/h | (566 km behind Twente) |
| 47 | Nagoya (Horizon Z, Challenger) |
592 km behind Nuon | 65 km/h | (591 km behind Twente) |
| 88 | Kogakuin (OWL, Cruiser) |
632 km behind Nuon | 63 km/h | (639 km behind Twente) |
| 40 | Eindhoven (Stella Lux, Cruiser) |
637 km behind Nuon | 62 km/h | (644 km behind Twente) |
| 11 | Bochum  (SunRiser, Cruiser) |
650 km behind Nuon | 62 km/h | (656 km behind Twente) |
| 45 | Lodz  (Eagle One, Cruiser) |
665 km behind Nuon | 62 km/h | (Trailered) |
| 33 | HK IVE  (Sophie V, Cruiser) |
666 km behind Nuon | 62 km/h | (Trailered) |
| 75 | Sunswift (eVe, Cruiser) |
667 km behind Nuon | 61 km/h | (673 km behind Twente) |
| 28 | Singapore  (SunSPEC4, Cruiser) |
672 km behind Nuon | 61 km/h | (Trailered) |
| 7 | MIT (Arcturus, Challenger) |
688 km behind Nuon | 61 km/h | (682 km behind Twente) |
| 38 | Tehran  (Persian Gazelle III, Cruiser) |
681 km behind Nuon | 61 km/h | (Trailered) |
| 9 | Adelaide (Lumen, Challenger) |
690 km behind Nuon | 61 km/h | (688 km behind Twente) |
| 43 | Ardingly  (Ardingly Solar Car, Cruiser)  |
693 km behind Nuon | 174 km/h | (Trailered) |
| 18 | EcoPhoton  (Stingray, Challenger) |
693 km behind Nuon | 63 km/h | (Trailered) |
| 51 | Kanazawa (Golden Eagle 5.1, Challenger) |
696 km behind Nuon | 60 km/h | (703 km behind Twente) |
| 12 | Cambridge (Evolution, Challenger) |
700 km behind Nuon | 66 km/h | (Trailered) |
| 32 | Principia (Ra 9, Challenger) |
706 km behind Nuon | 59 km/h | (710 km behind Twente) |
| 35 | Minnesota (Eos, Cruiser) |
718 km behind Nuon | 58 km/h | (724 km behind Twente) |
| 36 | Anadolu  (Sunatolia 2, Challenger) |
796 km behind Nuon | 55 km/h | (797 km behind Twente) |
| 26 | Durham (DUSC2015, Challenger) |
805 km behind Nuon | 57 km/h | (Trailered) |
| 34 | Liberty (Solis Bellator, Adventure) |
823 km behind Nuon | 54 km/h | (Trailered) |
| 80 | Beijing  (Sunshuttle II, Challenger) |
865 km behind Nuon | 52 km/h | (866 km behind Twente) |
| 20 | Houston (Sundancer, Adventure) |
874 km behind Nuon | 52 km/h | (881 km behind Twente) |
| 82 | KUST  (Baek-Ho, Challenger) |
892 km behind Nuon | 51 km/h | (894 km behind Twente) |
| 31 | ITS  (Widya Wahana V, Cruiser) |
892 km behind Nuon | 51 km/h | (Trailered) |
| 15 | Solaris (DesTech Solaris, Challenger) |
913 km behind Nuon | 50 km/h | (Trailered) |
Scientific Gems 
Are there any more details available about the Cruiser class rules tweak? I haven’t found any mention about it yet, other than here.
They seem to have done something to keep Minnesota and Sunswift in the race, although these two cars did not technically arrive in Alice Springs on time. I don’t know the details.
Thanks! In a vlog from Solar Team Eindhoven they say Sunswift didn’t know if they arrived in time. So I guess it was really close. https://www.youtube.com/watch?v=Dj4Xr-_AggU