Study Sample
# Vehicles # Days # Persons # Da
3,910 7 7,574 3
1}
_A< ~'
1,653 7 797 3
408 7 209 t
484 540 NA NA
624 2 NA NA
Tnis map husirates wie spatial extent u, ui.
3,404 1 NA NA each of which is assigned a different color.
2001 2002 2003
2004 2005 2006
2007 2008 2009
2010
2011
This timeline shows the vehicle data collection period for each provider.
The magnitude of the points on the timeline indicates the proportion of vehicle data sampled by day.
TSDC SECURE PORTAL ENVIRONMENT SUPPORT
DATABASES
PostgreSQL/PostGIS
ArcGIS Geodatabase
Microsoft Access
GIS
Quantum GIS
ArcGIS
uDig
SCRIPTING
Python (arcypy, numpy, scipy,
maplotlib, gdal, psycopg2)
R
SUPPORT DATA
Census 2010 demographic and economic data
Road network data (including grade and class)
Region-specific land use data
TSDC DATA ANALYSIS EXAMPLES
Vehicle Dwell Time
The chart on the right indicates dwell time following
trips of different purposes in California placed in 1
hour bins. The image on the right shows 3D columns
distributed over a 2D grid of southern California, with
the height of each column proportional to the
cumulative vehicle dwell time at non-home and nc
work locations. Applications for this type of analy
include infrastructure placement for electric and ot
alternatively fueled vehicles.
- .- Alin P
Speed and Acceleration on Different Road iypes
From left to right, these three density plots show the relative frequency of different speed and
acceleration conditions from multiple TSDC data sets on (1) all roads, (2) functional class 1
roads, and (3) functional class 3 roads after transitioning from a functional class 4 road.
o'ns for this type of analysis include predicting fuel use over potential driving routes.
VERY HIGH
...........H.G
.HIGH -";"
IL
MEDIUM
LOW
10 2Q 30 a
.vg Speed. mph
NONE
2012 2013
S..
N
Z
W