Just for the benefit of those who might be running into similiar issues with smart tag, I can confirm that using the new smart tag (slim full black which appears to have a bit better reception) I have had no problems passing through.

You do have however have to slow down a little bit more, and most importantly go closer towards the toll gate before it opens up.

This post has been edited by tanmat: Apr 5 2014, 04:15 PM