Morrisville Town Center Plan - 2007

Appendix 11

Professional offices/services/studios 10,000 sf (Low): EXP(0.77 x LN(10)+3.65) = 227 227 – 5% (linked) = 216 trips 17,500 sf (High): EXP(0.77*LN(17.5)+3.65) = 349 349 – 5% (linked) = 332 trips Residential 100 dwellings: 100 x 9.5 trips per dwelling = 950 trips

Trip Generation by Development Scenario Weekday, low food service/retail-high service theater (2 daytime, 1 evening) + park + food, low + retail, low + services, high + residential 229 + 160 + 205 + 166 + 332 + 950 = 2,042 vehicle trips Weekday, high food service/retail-low service theater (2 daytime, 1 evening) + park + food, high + retail, high + services, low + residential 229 + 160 + 410 + 332 + 216 + 950 = 2,297 vehicle trips Weekend, low food service/retail-high service @ 25% theater (2 weekend) + park + food, low + retail, low + services, high + residential 182 + 160 + 205 + 166 + 54 + 950 = 1,717 vehicle trips Weekend, high food service/retail-low service @ 25% theater (2 weekend) + park + food, high + retail, high + services, low + residential 182 + 160 + 410 + 332 + 83 + 950 = 2,117 vehicle trips Trip Distribution The Cultural and Civic Area contains three different development zones which also have different travel patterns. To the north is the E Street zone, consisting of residential development fronting E Street. Between this area and the Chamber of Commerce is the Center zone, containing all commercial and about half of all residential uses. Between the Chamber and Church Street is the Scoggins zone, another residential development. E Street The E Street residential zone is projected to contain about 30 dwellings. All of these dwellings will have either on-street or on-site parking accessible only from E Street. Thus the estimated 285 vehicle trips per day generated by this development will all be directed onto E Street. It is not feasible at this time to anticipate travel distribution beyond this point other than to note that most of these E Street trips would, at least in the near future, most likely be directed onto Town Hall Drive. A formula developed by traffic engineers to express as a ratio that larger office type uses generate less traffic on a per square foot basis. The formula is the “Exponent of 0.77 x the Natural Logarithm of the use’s square feet (in thousands) + 3.65”. A UNC-CH study for NCDOT of a walkable, mixed use development within the Triangle found that, on average, the development pattern reduced each household’s vehicle trips per day by 1. As the proposed development is smaller and surrounded by suburban development, the formula used reduces each household’s vehicle trips by 0.5, resulting in a trip generation multiplier of 9.5 rather than 10.

114 │ Town Center Plan

January 2007