# Spatial Surrogate for Hotelling

**URL:** <https://forum.cmascenter.org/t/spatial-surrogate-for-hotelling/305>\
**Category:** SMOKE\
**Created:** [September 14, 2018, 10:12pm UTC](https://forum.cmascenter.org/t/spatial-surrogate-for-hotelling/305 "2018-09-14T22:12:50Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![fher461](https://avatars.discourse-cdn.com/v4/letter/f/4491bb/32.png) [@fher461](https://forum.cmascenter.org/u/fher461)\
**Post date:** [September 14, 2018, 10:12pm UTC](https://forum.cmascenter.org/t/spatial-surrogate-for-hotelling/305/1 "2018-09-14T22:12:50Z")

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The old US Spatial Surrogate Workbook (v093013) has the hotelling surrogate (Off-Network MD/HD; ID 251) listed as “Combination of 50% Industrial and 50% Highway Exits; proxy to start/stop/idling locations for MOVES RPP and RPV heavy/medium duty vehicles”. I’m assuming the new RPH emissions in MOVES should also use the same surrogate.  
Has anyone found a better spatial surrogate source for hotelling? Or, is there an updated spatial surrogate workbook out there?

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**Author:** ![james.beidler](https://avatars.discourse-cdn.com/v4/letter/j/6f9a4e/32.png) [@james.beidler](https://forum.cmascenter.org/u/james.beidler)\
**Post date:** [September 16, 2018, 2:59pm UTC](https://forum.cmascenter.org/t/spatial-surrogate-for-hotelling/305/2 "2018-09-16T14:59:33Z")

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The 2016alpha platform available on the EPA CHIEF website uses surrogate 205 for hotelling. The surrogate package can be found under:  
ftp://newftp.epa.gov/air/emismod/2016/alpha/spatial\_surrogates/

The surrogate uses a heavy duty diesel truck potential idling location weighting shapefile, which is also available on CHIEF:  
ftp://newftp.epa.gov/air/emismod/2016/alpha/spatial\_surrogates/shapefiles/2014shapefiles.extended\_idle.tar.gz  
The shapefile is made up of point locations for truck stops, rest areas, and other locations where trucks might have a long idle.