Environmental Engineering Reference
In-Depth Information
Table 5
(continued)
Description
Application
Type/Collection
methods
Strengths
Weakness
Cordon
Collect travel pattern
data; origins/
destinations at the
perimeter of a region;
routing patterns;
truck/commodity
type; vehicle/cargo
weight; and, shipper/
carrier/receiver
information
Modeling/planning: the
development of
Origin-
Destination(OD)
freight flow matrices,
commodity tonnage
distribution to truck
classes, empty and
through truck factors
Roadside postcard
survey distribution
to be mailed back
Less likely to disrupt
traffic than
roadside
interviews;
requires fewer
personnel.
Response rate is usually
lower, which could
result in significant
non-response bias
License plate recording/
matching out to be
returned
Does not disrupt traffic
Lag between
observation and
survey reception
may lead to low
repones rates (and
bias) and high
recollection errors
Sources: (Beagan et al. 2007 , Jessup et al. 2004 , Cambridge Systematics 1996 , Miller et al. 1993 , Rizet et al. 2003 )
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