Archive for June, 2009

Fail-Safe Design

Friday, June 26th, 2009

A quick lunch-hour observation… Quincy Adams at The RBC is absolutely right that the control system for Metro trains, as described in the Washington Post, contains a fundamental design flaw.  I’d argue, however, that an effective solution can be designed that is far simpler than Quincy’s suggestion.  In fact, the system could have been designed […]


Tuesday, June 23rd, 2009

WMATA currently: Red Line Disruption at Fort Totten in both directions. Trains are turning back at Rhode Island Avenue & Silver Spring due to a situation outside of Fort Totten station. Shuttle bus service has been established. Expect delays in both directions. WMATA between 9-10 PM yesterday (unofficial twitter re-broadcast): Red Line Disruption at Fort […]

Economics, Energy, and the Environment.