Ok So I managed to make some "parallel" dots (testing) but I get empty spaces beetween like on the attached pic:

Here are my rules:
<rule e="way" k="network" v="lcn">
<lineSymbol src="file:/rower/blue_dot.png" repeat="true" repeat-gap="0dp" force-draw="1" scale="0.5" scale-icon-size="16,1.2" />
</rule>
<rule e="way" k="network" v="rcn">
<lineSymbol src="file:/rower/red_dot.png" repeat="true" repeat-gap="0dp" force-draw="1" scale="0.5" scale-icon-size="16,1.2" />
</rule>
<rule e="way" k="network" v="ncn">
<lineSymbol src="file:/rower/yellow_dot.png" repeat="true" repeat-gap="0dp" force-draw="1" scale="0.5" scale-icon-size="16,1.2" />
</rule>
Force draw doesn't seem to work.Any chance to make it force?