Hi
Swallowed a dictionary: Perhaps a case of malapropism
google "sententious traffic" brings up some uses (sites not trusted by WOT)
there is another set of definitions
sententious
1 aphoristic, axiomatic, brief, compact, concise, epigrammatic, gnomic, laconic, pithy, pointed, short, succinct, terse
2 canting, judgmental, moralistic, pompous, ponderous, preachifying (informal) sanctimonious
at
http://dictionary.reverso.net/english-synonyms/sententiousMind you need a dictionary for half of those anyway
Regards Jeff