As you know, the Malaysian side of the Causeway is currently undergoing renovation or sort. As a result, the pathways had been narrowed significantly at the entry side.
However, I have noticed that many Singaporean biker groups who probably having some outings tends to stop indiscriminately along the pathways out of the immigation booth. This is very dangerous and selfish. So guys, if you are having an outing, how about meeting at say, some coffee shop or other safe place, rather than within the Causeway, especially where those Malaysian kupkia are riding dangerously treating it as F1 circuit.