Ambrug20
Project Engineer
Maximus808 posted the question in Aug.27, but I missed it. He is the question by Max.
“I'm doing a sample problem that gives me the AADT but no value for D or K. It states that the multilane highway is in a low-density suburban area. The solution assumes values for K=0.093 and D=0.60. Do you know where we can find these default values for K and D if these are not given to us. The problem is to calculate the number of lanes to meet LOS C for a divided multilane highway. Speed is also not given which we assume as 60mph and since it is divided we factor that in for to find the FFS. Can anyone help me out, thanks. “
CERM p. 73-4 states K-factor default is 0.09(urban) & 0.1 (rural) other references HCM 8-11;
CERM p 73-5 (on the top left) states that D (direc. Factor) is 80%(rural), 50% central business, and 60% (0.6) is default.
Max,
can you post the problem and answer, please or pdf at [email protected]thanks
“I'm doing a sample problem that gives me the AADT but no value for D or K. It states that the multilane highway is in a low-density suburban area. The solution assumes values for K=0.093 and D=0.60. Do you know where we can find these default values for K and D if these are not given to us. The problem is to calculate the number of lanes to meet LOS C for a divided multilane highway. Speed is also not given which we assume as 60mph and since it is divided we factor that in for to find the FFS. Can anyone help me out, thanks. “
CERM p. 73-4 states K-factor default is 0.09(urban) & 0.1 (rural) other references HCM 8-11;
CERM p 73-5 (on the top left) states that D (direc. Factor) is 80%(rural), 50% central business, and 60% (0.6) is default.
Max,
can you post the problem and answer, please or pdf at [email protected]thanks