Nearly a decade ago, Los Angeles County voters overwhelmingly approved Measure M, a half-cent sales tax to fund projects focused on public transportation. The idealistic vote gave Angelenos a lot to look forward to, including a $365 million plan for an 8-mile bike path along the Los Angeles River, which would close a crucial gap between existing paths lining LA’s concrete channelized waterway. The expected opening date: 2025. But, as the year nears a close, the bike path still isn’t open. In fact, construction hasn’t even started, and the environmental review process is still in the early stages. In the...