Episode 23, recorded June 22, 2018, includes an update on recent events, a discussion of the "driver window" and communication best practices, details of upcoming courses, and some thoughts on the challenge of complex system design. Sections include: - 00:00 - Travels in the south - 06:50 - Driver windows and communication best practices - 27:25 - Fall protection and defensive driving - 39:30 - LCVs and complex system design