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110 David Laudicina commented that Chatham County is planning to develop its whole northeastern quadrant with 111 60,000 new residents. 112 113 Andy Henry agreed that Chatham County's population is growing the fastest, especially around Pittsboro with a new 114 development called Chatham Park, and the existing Briar Chapel community. Chatham County has an agreement 115 with Cary about how far they can come into the County with planning. There are a lot of apartments and senior 116 housing in that area. 117 118 Art Menius commented on the 2013 population just for the portion in Chatham; it is about twice the entire population 119 for Chatham in the 1980 Census. 120 121 Andy Henry agreed that Chatham County is forecasted to grow pretty quickly. He continued his presentation. The 122 performance measures in the alternative analysis shows different data on measures such as the average minutes of 123 delay per person and mode share in a "no build" scenario. Travel isochrones show how far someone can travel in the 124 afternoon peak within 10 -20 -30 minutes (see contours on the maps in presentation) in centers heavy in commuting 125 traffic around the Triangle (especially in downtown Durham, Chapel Hill, Hillsborough, etc.). The idea is to show how 126 easy it is to commute. Travel time is also measured on roadway corridors like 1 -85 to look at travel time in a "no build" 127 scenario and the effects of building alternatives. Mr. Henry pointed out that even with improvements, travel time will 128 not recover. According to the model, if travel time is 20 minutes with the "no build" scenario, it may go down to 16 129 minutes even with costly improvements, but not much lower than that. The congestion map shows volume (V = 130 number of vehicles on the road) divided by capacity (C = how many vehicles road can handle). The map is color - 131 coded per percentage. The Level of Service at a 100 percent is a level of service "E," on an A -F range where "F" 132 (120 %) is traffic almost standing still and "A" is free - flowing. Therefore, a level "E" is pretty congested. The main 133 highway corridors are very congested as well as areas within Chapel Hill and around it, especially around Estes 134 Drive. 135 136 Heidi Perry asked if these maps are based off of single occupancy vehicles for each person, so when you think of 137 population growth, even with a "no build" scenario, you are talking about having more single occupancy vehicles. 138 139 Andy Henry said that he was glad Ms. Perry brought -up the "no build" scenario. The presentation is based on no 140 build, no further improvements with the 2045 population and employment on the model. However, it is not all single 141 occupancy vehicles; 10 —15% would not be single occupancy vehicles. 142 143 Heidi Perry asked if the current mode share is built -out too. 144 145 Andy Henry said that this is a difficult question to answer but the model does not take the current mode share. The 146 model has some behavior worked into it; it will change the mode share between single occupancy and multi - 147 occupancy. However, it does not change much; the model is not that sensitive. 148 149 Alex Castro asked who determines the parameters of the model. 150 151 Andy Henry said that there is a team that works on the model. The Triangle Regional Model has four partners: our 152 MPO, the Capital Area MPO, NCDOT, and Go Triangle. The partners provide financial investment and there is a 153 model team at NC State in the Institute for Transportation Research and Education (ITRE). 154 155 Alex Castro asked for clarification as to if there was a standard model used statewide. 156 157 Andy Henry replied that there is not a standard model. 158 159 Alex Castro asked if the model is just used by the region. 160 161 Andy Henry confirmed this. He said that there is a statewide model but it just does the main roads. Regions use the 162 statewide model to help inform the goings -on outside of the model area regarding trends and changes. 163 164 Heidi Perry asked if Mr. Henry has looked at previous projections to see how they played out. 7