▁the ▁road way . ▁Alternatively , ▁some ▁construction ▁would ▁produce ▁dangerous ▁conditions ▁to ▁passing ▁vehicles , ▁such ▁as ▁bl ast ing . ▁ ▁In ▁very ▁rare ▁circumstances , ▁civil ian ▁motor ists ▁have ▁initi ated ▁traffic ▁breaks . ▁In ▁ 2 0 0 4 , ▁one ▁Al amed a ▁County ▁man ▁ran ▁a ▁traffic ▁break ▁to ▁aid ▁in ▁the ▁emer gency ▁landing ▁of ▁a ▁small ▁C ess na ▁ 1 7 2 ▁on ▁Inter state ▁ 5 8 0 . ▁ ▁When ▁a ▁single ▁traffic ▁break ▁does ▁not ▁allow ▁sufficient ▁time ▁to ▁complete ▁a ▁task , ▁multiple ▁breaks ▁may ▁be ▁conducted ▁in ▁series . ▁This ▁practice ▁is ▁called ▁" running ▁a ▁round - ro bin ". ▁ ▁During ▁times ▁of ▁high ▁con g estion , ▁ris ky ▁driving , ▁or ▁dangerous ▁road ▁conditions , ▁law ▁enfor cement ▁may ▁inst itute ▁so - called ▁" rolling ▁road block s ," ▁where ▁official ▁vehicles ▁line ▁up ▁across ▁the ▁road ▁and ▁drive ▁at ▁a ▁set ▁speed . ▁Since ▁anyone ▁attempting ▁to ▁pass ▁them ▁would ▁be ▁doing ▁so ▁on ▁the ▁shoulder ▁and ▁thereby ▁gar ner ing ▁a ▁ticket ▁from ▁the ▁officer , ▁traffic ▁spe eds ▁are ▁kept ▁at ▁the ▁desired ▁level . ▁ ▁Tra ffic ▁breaks ▁by ▁vehicles ▁other ▁than ▁autom ob iles ▁ ▁Some ▁traffic ▁breaks ▁have ▁been ▁initi ated ▁by ▁vehicles ▁other ▁than ▁autom ob iles . ▁ ▁For ▁example , ▁a ▁motor bo at ▁driver ▁initi ated ▁a ▁traffic ▁break ▁in ▁the ▁Riv ière ▁des ▁Pra i ries ▁in ▁order ▁to ▁keep ▁marine ▁traffic