A summary of the June 14 public meeting and comments has been posted to interchange19.org, along with comments submitted online and by email.
One question and response does not appear to have been transcribed accurately:
Question: Can the engineers quantify the time savings from more expensive alternatives? Maureen answered that time savings from some of the build alternatives are four minutes along the Route 5/10 corridor and six minutes along the Route 9 corridor.
On review of the video (see below), Maureen appears to actually say that the engineers estimate that travel times will increase by four and six minutes over the forecast period, and that building a full interchange at Exit 19 will reduce those times by two minutes.
These slides from the presentation appear to show that Concepts 13A, 13B and 13C reduce delays to a similar extent as Concepts 15, 15A, 16, 17 and 18, but with a much lower impact on the surrounding neighborhood and a much lower cost.
Gazette: “Consultants air designs for Exit 19 improvements” (6/14/10)