Feb. 10, 2011
Chevy Chase Patch
Purple Line Consultants Update Town of Chevy Chase Group on Noise Studies, Lynn Drive Crossing
The Maryland Transit Administration consultants are waiting on resident agreements to do a new noise study and showed three grade-separated crossings near Lynn Drive.
By Natalie Neumann, Staff Writer  
Residents from the Town of Chevy Chase along with county representatives convened with consultants for the Maryland Transit Administration for updates on the Purple Line earlier this week.
Purple Line Project Manager Michael Madden was unable to attend, as he is on medical leave.
Noise Study
During the Tuesday night Purple Line Mitigation Advisory Group meeting, the consultants gave updates on a new noise study that will be conducted. The town had concerns that the original study had no measurements taken in the town other than at a busy area near East-West Highway.
In November, MTA consultant Harriet Levine said they would conduct some noise studies in the town before snowfall. However, Levine said Tuesday she had received permission from only one resident allowing them to take noise levels from the backyard for a 24-hour period. Levine said they are planning on collecting the noise data from six various areas in the town.
Council member and community liason Patricia Burda said the town would send out a follow up note or e-mail to make sure residents turn the forms in.
After the study is done, the state will also estimate the noise that would potentially be generated by the Purple Line. The estimation would be based on the elevation of the transit way and the ground, the types of wheels and type of railcar.
Levine said the noise analysis of what types of mitigation are needed will take about eight to nine months.
The group also requested to see the raw data from the noise study.
Lynn Drive Crossing Options
The consultants also presented three possible grade-separated options for a crossing at Lynn Drive, a crossing used by residents, including students who walk to Bethesda-Chevy Chase High School.
The first option is the only one that crosses over the tracks. It would be an above ground crossing with a ramp and three steep flights of stairs. The stairs would be behind one house and could pose some privacy issues, said Levine.
The crossing would end at the sidewalk along East-West Highway.
The ramp would go into the yards of some residents who live near the Georgetown Branch of the Capital Crescent Trail.
The second option included a combination of ramps and stairs and doesn’t cross over the tracks, but would also go into some of the residents’ yards. Similar to the first, the ramp would go into some residents’ yards. This option doesn’t cross over the tracks, but also ends at the sidewalk along the highway.
One resident called this option “a skateboarder’s dream.”
With the first two options, residents were concerned people would cross East-West Highway, especially if there wasn’t a fence there.
The third option would cross at the East-West Highway Bridge and would, like the second option, not cross the tracks. It would cut into some of the residents’ yards but not as Unlike the other options this crossing could be made Americans with Disabilities Act (ADA) compliant.
The town’s Purple Line Mitigation Advisory Group requested more tweaking of the options before their next meeting in March.
http://chevychase.patch.com/articles/purple-line-consultants-update-town-of-chevy-chase-group-on-noise-studies-lynn-drive-crossing