6.5 The lane lines are always positioned vertically so that the top of a line is 1 sw above the top of a vertical arrow head, whether the sign has horizontal bars or not.
6.6 Where a lane line is truncated at the top of the sign (as in figure 6-2) the minimum length of line should be 3sw. Where this cannot be achieved, the line should be omitted, as shown in figure 6-1. The minimum gap between the lane line and the top border is 1.5 sw.
6.7 Where a sign incorporates the chevron markings shown in figure 6-4, it may be necessary to adjust the position of the chevrons it there are three or more lines of legend. Simply to extend the length of the chevron marking (and hence the number of chevrons) would unnecessarily increase the overall width of the sign. In most cases the solution is to move the chevron markings upwards by one lane line module of12sw, as illustrated in figure 6.5|6-5.
73
