so mr. dykes. thank you for leading us off today. >> thank you. supervisor wiener and cohen.'s my pleasure to be here. thank you. i'm the principle engineer at tjpa and i have been involved in this design and project for seven years as a member of tjpa. and for some years before as a consultant. just a quick recap. elements of the project, the downtown extension starts at grade down near colman street and the tracks, two tracks are peeled off parallel to 7th street and reach of the beginning of the tunnel portal beyond 6th street, having go underneath the 6th off-ramp from the freeway. this is now fairly shallow cut-and-cover work to build an underground station at 4th and townsend and then still cut-and-cover until we get to 3rd street, where we are turning left into 2nd street and arrive at rock or soft rock rather than water and mud, which we have had up to this stage. so it's a mined tunnel. actually the best rock on this sandstone. it stops being a mine tunnel when we run out of rock at the other end, beyond folsom street, halfway to howard street. also at that stage, th

. >> thank you, mr. dykes. >> i believe that we have forwarded the powerpoint presentation to both members. let me know if you have gotten it. >> we actually added a few more slides to the end of this and we're happy to share it to you and i have saved it to this laptop. >> if you could send that to us, that would be great. >> thank you for having me. my name is lisa fisher an urban planning at aecom in the urban planning group. hopefully this presentation will be helpful and inspiring and also welcome this to be a start of a larger dialogue, if you need our assistance moving ahead with other examples. we have the benefit of working around the world and pretty much every discipline that has to do with the built environment. and what we have done today is compiled some lessons learned and some visual examples from mainly projects in europe, with one japanese example. i think the main thing that we would like to show in these images is -- sorry, is that better? okay. the main topics of accessibility, flexibility

understand it until about four or five months ago was to have the differential heights and that is what mr. dykesd in the previous presentation as the plan put forward by the design of the new downtown transit center; which did show in the illustration that he had, that there were two dedicated platform phases. that were at a different height than what the four were for california high-speed rail. so that has been the initiation of the conversation over probably the last four or five months. there have been different discussions at other locations along the caltrain right-of-way. where the plan that high-speed rail initially had that i understand was down at diridon in san josÉ, so there would not by a platform compatibility problem. at millbrae, several plans -- one was to put at least one of the tracks for caltrain on underground so they could go ahead and have those different platforms at the millbrae station. there was discussion for redwood city as a potential for a fourth stop, but probably four, five months since the june-july timeframe this has come to the surface and has been triggered b