Work Zone Capacity
Kevin Murai State of California Department of Transportation 
Equation 109 Work zone capacity As noted, the average queue discharge drop rate is higher in a freeway work zone than in a nonwork zone. By using these rates in equation 109, the calculated work zone capacity will always be greater than the nonwork zone capacity, which should not be the case. Should the denominator in equation 109 be adding rather than subtracting the average queue discharge drop rate? For example QDRwz=2000 Cwz (13.4% avg queue discharge drop) = 2309 Cnonwz (7% avg queue discharge drop) = 2151 If you revise equation 109 by adding the avg queue discharge drop rather than subtracting, then Cwz = 1764 Cnonwz = 1869 These rates make more sense. Any clarification would be appreciated. Thank you. (Edited July 9th, 2020 at 5:31 PM UTC) 

Cooper Calhoun Alabama Department of Transportation 
I am noticing the same situation with the equation for work zone freeflow speed. As stated on pg.1044 the higher the work zone speed limit then the higher the work zone FFS, but the equation calculates differently. (Edited July 24th, 2020 at 5:32 PM UTC) 
Sign in to add a reply. Don't have an account? No problem, sign up for free.