www.naikgroup.com       New  York ,  New   Je rsey ,  Pennsy lvan ia  

PN-­‐8T  Jamaica  Reconfiguration  Study  Jamaica,  Queens,  New  York  

The   PN-­‐8T   Jamaica   Reconfiguration   Study   studied  options   for   reconfiguration   of   the   Jamaica  Interlocking/Station  facilities  to  increase  capacity  and  train   throughput.   These   potential   changes   are   in  large   part   driven   by   the   East   Side   Access   project  currently  under  construction.  Naik  Consulting  Group,  PC   (NAIK),   as   a   subconsultant   to   STV,   provided  comprehensive  surveying  and  mapping  for  the  study,  which  covered  approximately  150  acres  and  26  track  miles.  

All  surveying  for  this  project  was  performed  in  such  a  way   as   to   minimize   interruptions   to   normal   train  operations  through  the  station,  one  of  the  busiest  in  the  country  with  more  than  200,000  passengers  each  

day.   To   accomplish   this,  we   used   a   combination   of   low   altitude   aerial  mapping   (LAMP),   terrestrial   3D   laser  scanning,  and  Leica  SmartRover  RTK  units.  

LAMP  was   performed   by   our   subconsultant,   Aerometric.   Coordinating   access  with   the   FAA   to   the   airspace  proved  to  be  difficult  because  of  the  project’s  location,  directly  between  LaGuardia  and  JFK  airports.  Indeed,  on  the  first  day  scheduled  for  flight  operations,  our  work  was  interrupted  by  the  surprise  visit  of  Air  Force  One  on   a   photo   opportunity   over   the   Statue   of   Liberty.   After   that,   operations   resumed   with   no   further  interruptions.  

NAIK   set   and   provided   3D   coordinate   values   on  approximately   175   chevron-­‐type   aerial   targets.  Control   values   were   provided   to   Aerometric   for  their   use   in   the   aerotriangulation.  Aerometric   then  created   linework   and   spot   elevations   for   the   areas  visible  from  the  air.  3D  AutoCAD  files  were  delivered  to   NAIK   for   field   edit   and   creation   of   final  deliverables  to  the  client.  Aerometric  also  created  a  digital   orthophoto   and   captured   oblique   aerial  photos  for  presentation  purposes.  

The   complex   nature   of   the   site   made   it   necessary  for  extensive   field  editing  of   the  aerial  mapping,  as  it  needed  to  cover  areas  not  visible   from  the  air  as  well   as  more   precise   locations   on   points   of   switch  

and  points  of  frog  which  were  located  using  the  Leica  SmartRover  GPS  units.  The  field  edit  was  performed  using  LIRR  flagging  protection  with  track  outages  during  non-­‐rush  hour  time  slots   (between   10:00   AM   and   3:00   PM).   Extensive   planning   was   performed   to   ensure  complete  coverage  of  all  tracks.  

 

     www.naikgroup.com       New  York ,  New   Je rsey ,  Pennsy lvan ia  

Agency/Owner:    MTA  /  Long  Island  Rail  Road  Project  Duration:      2009-­‐  2010  

 

This   was   particularly   difficult   in   the   interlocking   areas  directly   adjacent   to   each   end   of   the   platforms.   This  interlocking   allows   train   movement   across   all   eight  platform   tracks.   All   survey   crew   members   and   utility  engineers  maintained  LIRR  safety   training  certifications  throughout   the   period   of   the   project.   Daily   crew  briefing   meetings   were   held   on-­‐site   with   the   LIRR  project  manager  to  discuss  the  day’s  planned  work  

3D  laser  scanning  was  used  for  the  platform  area  as  well  as  all  of   the  roadway  underpasses.  A  Leica  ScanStation  and  an  HDS6000  were  used.  Each  area  was  collected  in  its   own   Cyclone   database,   amounting   to   37   databases   containing   approximately   65GB   of   data.   High-­‐resolution   color   photography   was   also   captured   at   each   scan   location   allowing   for   review   by   office  personnel   during   drafting,   as   well   as,   providing   an   excellent   tool   for   quality   control.   Following   the  registration  of  the  scan  data  our  Cyclone  operators  extracted  planimetric  and  3D  breakline  information  to  be  incorporated  into  the  main  CADD  files.  

A  comprehensive  utility  survey  was  also  performed  during  the  field  edit  which  included  capture  of  naming  and   designations   on   all   boxes,   switches,   etc.   All   utility   boxes,   manholes,   and   lines   were   opened   and  inspected.  Extensive  photographic  data  was  captured  at  each   location  using  a  camera   that  “geotagged”  the  file.  This  means  that  the  location  data  was  stored  in  each  photo  so  that  it  could  then  be  plotted  on  a  map.  

Final   CADD   deliverables   were   prepared   compliant   to   the   LIRR   CADD   Standards   in   AutoCAD   Land  Development  Desktop  2009  (LDD).  The  final  drawing  set  included  55  –  24”x36”  sheets  at  1’=20”.  DTMs  for  the   entire   project   site   were   prepared   integrating   all   sources   of   data.   Twenty   individual   surfaces   were  created  to  cover  all  the  overhanging  areas.  The  final  deliverable  from  the  DTM  was  to  be  in  LDD,  but  the  prime  consultant  needed  the  surfaces  translated  into  Bentley  InRoads,  so  NAIK  prepared  the  surfaces  in  both  platforms.    

This   project   demanded   flexibility   in   planning   and   executing   the  work.   The  major   issues  were   restricted  access,  a  large  scope  area,  and  complexity  of  the  information  required.  Understanding  these  issues,  NAIK  used  its  extensive  experience  in  transportation  infrastructure  surveying  to  devise  a  survey  plan  integrating  multiple  data-­‐capture  methodologies  and  equipment.