One of the traffic bottlenecks and annoyance in SS16 today is the que to u-turn at the traffic light in front of Carrefour Subang Jaya. This que caters to cars originating from Persiaran Kewajipan, and some from SS15/5, that are trying to access the developments in East SS16, from Carrefour, Subang Avenue up to Mesiniaga, as well as the KTM Komuter Station. They have no choice but to u-turn at this junction. This junction also caters for vehicles that need to turn right to access Subang Parade and Saujana Residency.

The simple solution of traffic light timing increase is not very practical here, as it will cause traffic to backlog on both Persiaran Kemajuan (in front of Subang Parade), possibly clogging the other traffic light in front of Subang Parade & Wisma Consplant. One the other side, at Jln SS16/2, it is the only way out (besides making a loop all the way to Subang SOHO) for vehicles exiting Carrefour, Subang Avenue, etc to the rest of Subang Jaya. 

The suggestion that I had put forward a couple of years ago is finally showing signs of materialising. The proposal is for Junction 1 in the diagram below to be upgraded, so vehicles from Persiaran Kewajipan can directly access Jalan SS16/1, and all the developments on it. This should shorten the driving distance, time and frustration for most drivers heading this direction. 


When this is done, The right turn into SS16/2 can be closed, giving smoother and faster passage for vehicles exiting SS16/2 and cars coming from Subang Parade towards Carrefour. 

This wasn't done earlier, mostly because of the high cost involved in upgrading the junction 1. There are a lot of utilities that needs to be relocated to make this work. Thus, MPSJ has imposed this upon Prasarana for the construction of the LRT station 4, to do this upgrading. 

Another suggestion that I had made is to connect the inner road in front of Subang Avenue, Casa Tiara to Persiaran Kemajuan, under the flyover. This will give the residents and shoppers there a faster dispersal, rather than going one round around SS16/1, thru SS16/2 to come back to Persiaran Kemajuan. This suggestion is still under evaluation by MPSJ.