When should 叉 or 岔 be used when talking about a forked road? I have encountered the following usages of 叉 and 岔 when dealing with forked roads:

叉路口
交叉路口
叉路
三叉路口

三岔路口
四岔路口
岔路口


Is there any rhyme or reason to when to use 叉 vs. 岔? Is one more correct than the other? or only in certain usages? 

Based on a google image search, it seems like 岔路 is used on road signage more often than 叉路.
There's a similar question here:

https://zhidao.baidu.com/question/326153419.html

that asks:


  岔路口 叉路口有什么区别 


the answer reads:


  岔路口有方向概念，也即你面朝的方向有两条以上的分岔路；叉路口（一般不这样叫）一般称为交叉路口，指两条以上的路相互交叉。


岔 = forked (road) like this:



the road splits in front of you, like crossroads.

叉 = intersect like this:



like a junction or an intersection.