About: http://webisa.webdatacommons.org/110300991

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	The guard time is based on GPS determined time and position and is a function of the worst case range uncertainty between the mobile unit and the AV and any AV or mobile unit clock errors.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com