WTOP radio 12/18/17:
Some trains are shaking Petworth houses, Metro GM says
WASHINGTON — Metro trains are vibrating some homes in D.C.’s Petworth neighborhood, but Metro believes the shaking isn’t enough to cause structural damage.
The preliminary findings, by a consultant hired to investigate claims of trains shaking houses, come from a letter from Metro General Manager Paul Wiedefeld to D.C. Councilmember Brandon Todd on the issue.
SNIP
Vibration studies were conducted in homes near the stretch of the Green Line in question, and, according to Wiedefeld, 10 houses experienced levels above Metro’s self-imposed limits.
The investigation did not, however, indicate Metro’s newest trains were the only culprit. Wiedefeld wrote that two-thirds of the trains which produced elevated vibration levels were older model trains.
More here.