Diagram representing the subroutine to solve collisions:

Abstract

<p><b>TN</b> mean trailing RNAP in normal elongation. <b>LN</b> means leading RNAP in normal elongation. <b>LBb</b> means leading RNAP in backtracking backwards movement. <b>LBf</b> means leading RNAP in backtracking forwards movement. <b>TBb</b> means trailing RNAP in backtracking backwards movement. <b>TBf</b> means trailing RNAP in backtracking forwards movement.</p