Hi, Zack

Thank you for your reply.
As long as this is not the junction, GH will process it properly. As you mentioned, it is good to move this ERP node to little bit north not making junction. 

By the way, before the fix, is this true we have only one ERP gate here? 

It seems that's the case from the onemonitoring site, https://onemotoring.lta.gov.sg/content/onemotoring/home/driving/traffic_information/traffic-smart.html , but I want to be more accurate. Thank you.