About: http://webisa.webdatacommons.org/177976150

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Although part of the impedance may partly be cost and travel time, which has already been captured, there may be additional impedance due to availability and cost of parking, safety, and other factors.
http://www.w3.org/ns/prov#wasQuotedFrom	trb.org