Friday, February 4, 2011

Change in transit commuting for areas around some LA Metro stations, 2000 to 2005-2009

I was interested in finding change in transit ridership between 2000 and the 2005 to 2009 period captured in the American Community Survey, so I mapped the ACS2009 5-Year data and Census 2000 data at the block group level, then joined it with station areas, using area-weighted allocation for any block groups only partially within a 1/2 mile radius area.

We have a lot of data that is currently being used in research projects, but I wanted to share some of the findings below.

Which station areas experienced the highest growth in total number of transit commuters?

RED/PURPLE - WESTLAKE / MACARTHUR PARK2530.5
RED/PURPLE - WILSHIRE / VERMONT1784.8
PURPLE - WILSHIRE / NORMANDIE1711.1
RED - VERMONT / SANTA MONICA1172.4
RED - VERMONT / SUNSET743.3
RED - HOLLYWOOD / WESTERN610.5
RED - VERMONT / BEVERLY601.1
BLUE - ANAHEIM461.4
ORANGE - RESEDA STATION431.4
ORANGE - VAN NUYS STATION297.6
bold denotes a new station

Which station areas experienced the greatest change in the percentage of workers who commuted on transit?
GREEN - I-105 / AVIATION8.24%
BLUE - WILLOW6.19%
GOLD - S WEST MUSEUM / FIGUEROA5.95%
GOLD - ALLEN AVE5.62%
RED - VERMONT / SUNSET4.23%
ORANGE - DE SOTO STATION4.12%
GREEN - I-105 / AVALON4.09%
GOLD - MISSION ST4.05%
GREEN - NASH / MARIPOSA3.92%
GOLD - HOLLY ST3.57%
bold denotes a new station

Many of the green line stations in the second table have very few workers in the area, so the numbers are skewed. For instance, the I-105/Aviation station only had 800 workers within 1/2 mile, and 40 of them took transit.

Obviously the new Gold and Orange lines would be expected to create new transit commuters, since they opened in between the two Census surveys.  I think the big success story is the Vermont and Sunset station, which added 743 transit commuters and 2,023 workers between 2000 and 2005-2009.  This likely indicates that many people moved to the Vermont/Sunset station area specifically because they wanted to take transit to work.

What do you think?

2 comments:

Ironica said...

This is tantalizing, but I'm not grasping exactly what's shown here. Are the percentages the amount it's increased by, or the point difference between the previous percentage and the new one? Are these basically the same numbers expressed in two different ways, such that the numbers in the top table would be the numerator when calculating the percentages in the bottom table?

Juan Matute said...

@Ironica - it's the change in percentage of working population that is commuting via transit. It does not control for some areas which have very few workers. It's the difference between the transit mode share for two periods rather than a growth rate. I have edited the entry so that is clearer.