▁the ▁end ▁the ▁drivers ▁are ▁re - pla ced ▁based ▁on ▁the ▁new ▁lap ▁tot als . ▁ ▁Last - ch ance ▁he ats ▁are ▁similar ▁to ▁main s . ▁The ▁top ▁compet itors ▁( number ▁of ▁lan es ▁minus ▁one ) ▁from ▁the ▁round ▁ro bin ▁move ▁into ▁the ▁main , ▁and ▁the ▁run ners - up ▁( as ▁many ▁as ▁there ▁are ▁lan es ) ▁are ▁moved ▁into ▁the ▁last ▁chance ▁heat . ▁The ▁last ▁chance ▁heat ▁is ▁run ▁before ▁the ▁main , ▁and ▁is ▁usually ▁run ▁with ▁the ▁same ▁time ▁parameters ▁as ▁the ▁other ▁he ats . ▁At ▁the ▁end , ▁the ▁top ▁compet itors ▁from ▁the ▁last - ch ance ▁are ▁re - pla ced ▁based ▁on ▁their ▁new ▁lap ▁tot als ▁( though ▁never ▁lower ▁than ▁a ▁compet itor ▁that ▁didn ' t ▁make ▁the ▁last - ch ance ), ▁and ▁the ▁winner ▁of ▁the ▁heat ▁moves ▁into ▁the ▁final ▁position ▁in ▁the ▁main . ▁ ▁Bra cket ed ▁formats ▁are ▁usually ▁reserved ▁for ▁national ▁events , ▁and ▁include ▁qual ifying , ▁elim ination ▁cons is , ▁semif inals , ▁and ▁a ▁main . ▁ ▁When ▁the ▁segment ▁time ▁has ▁el apsed , ▁a ▁small ▁amount ▁of ▁time , ▁usually ▁one ▁minute , ▁is ▁given ▁for ▁the ▁driver ▁to ▁switch ▁lan es , ▁perform ▁any ▁necessary ▁maintenance ▁to ▁his ▁car , ▁and ▁return ▁his ▁car ▁to ▁its ▁rest ing ▁position ▁( al beit ▁in ▁a ▁different ▁l ane ). ▁At ▁the ▁same ▁time , ▁the ▁next ▁driver ▁in