NYC-WTC_000187725

NYC 9/11 Public Portal Document

37 Shopping trip patterns are also computed. Chapter 5 of this Handbook provides illustrative applications of NYREG to eight policy related simulations. The model outputs are presented in extensive detail.

Data Aggregation and Calibration of nyreg's Coefficients There are many levels of aggregation at which model zones may be defined. Zones may be city blocks, census tracts, groups of census tracts, zip code areas, counties, or even entire states. The definition of NYREG's super zones in New York City and their correspondence with census tracts is presented in a series of maps (Figures 2.1, 2.2, 2.3, and 2.4) and is shown in Table 2.1.

Table 2.1 Aggregation of Zones in MYRE6

Area Tract SPZN CTTS Work Home Shop Manhattan 300 43 25 299 299 25 Queens 671 40 8 40 40 8 Brooklyn 790 67 8 67 67 8 Bronx 356 42 5 42 42 5 Suburbs 5 5 5 Periphery 1 1 1 Total 2117 192 46 454 454 52 Note; Tract: Census Tract; SPZN: Super Zone; CTTS: Comprehensive Telephone Travel Survey Zones.

In Manhattan, zones were defined as census tracts, while in the Bronx, Brooklyn, and Queens, zones were defined as aggregations of contiguous tracts called "super zones". Still larger tract aggregations were used to define the shopping zones in Manhattan, the Bronx, Brooklyn, and Queens. These groupings are based on the geography defined by the MTA’s Comprehensive Telephone Travel Survey which provided shopping trip characteristics for NYREG's calibration. Richmond (Staten Island) and four suburban counties (Bergen, Putnam, Rockland and Westchester) were included as whole counties, or giant zones, for jobs, residence and shopping. All remaining areas in New York, including Long Island, in New Jersey and in Connecticut were aggregated into one larger peripheral super zone.

CITY_21MC100_006662268

NYC-WTC_000187768