Brooke Luder is a graphic designer and illustrator who once worked for SEGA Australia, being involved with games like Sonic Classic Collection (DS), while also working for Krome, Konami, and Gameloft as an artist and designer. On the portfolio page you’ll find some interesting pieces of work, with the most striking one being a concept sketch for Crazy Taxi 4. There isn’t much shown, but it does indicate an idea of passengers jumping between taxis. That would have been an interesting game mechanic for sure.
You can check out the concept sketch of Crazy Taxi 4 on the artist’s official portfolio here.
Source: Sonic Stadium