that sadis crypter of what would occur as you go through the process to go ahead and seal the traps and some of the pieces that are there in terms of the impacts are in terms of dwell time, challenges for passenjure and bike circulation. each of the scenarios has iits own pluses and minuses. potential path forward, i'll let casey come back up nols you have any other questions at this point? >> we have no questions at this time, thank you >> okay, i'll go 33 the next couple slides on the path forward and we have met with lots of groups including ada. for the potential path forward we have to keep in mind the framework which is makes this more complicated. the blending system is not yet defined. there needs to be more community planning and environmental [inaudible] right now we vaconceptual idea of what the blended system is but we do have is the early investment program and it is actually call thd high speed rail early investment program. that is a advanced signal system and lect fiication projenth. that is environmental cleared and do have it defined. what we have been asked to do is m