"I do this kind of racetrack inset on my guitar amplifier cabinets all the time. I cut the center out (1/2" Baltic Birch ply) roughly with a jigsaw, then attach a MDF template and finish the rout with a straight pattern bit on my router table. Not incredibly efficient, but to get this look that's the way to go (barring CNC). I use the leftover center waste for cleats, jigs, etc. Once the cabinet is glued up with the racetrack inset, I round over the racetrack on the router table."
"I work as a touring guitar tech (roadie) and we use these every day at shows to keep artists and crew from tripping over cables and also to allow the rolling on/off of gear without having to lift at set-change and load-out. We just call them 'cable ramps'... I agree on that it's great industrial design, and I like the jigsaw tabs so you can string them together."