An estimation procedure for a mode choice model of the nested Logit structure,

found that UT$=$aT$+$ x Logsum with aT$=-0\mathrm{.}61$ and $=0\mathrm{.}8.$ For a particular zonal

interchange, the following modal utilities were calculated in accordance with the

estimated nested Logit model: UA$=-2\mathrm{.}11,$ UB$=-2\mathrm{.}89,$ and UR$=-2\mathrm{.}63.$

Calculate:

a$.$ The corresponding mode shares.

b$.$ The effect of a policy that is expected to cause a change $$UR$=0\mathrm{.}20$

and $$UB$=0\mathrm{.}25$ on the mode shares.An estimation procedure for a mode choice model of the nested Logit structure,

found that $U_T=a_T+$ Logsum with $a_T=-0\mathrm{.}61$ and $=0\mathrm{.}8.$ For a particular zonal

interchange, the following modal utilities were calculated in accordance with the

estimated nested Logit model: $,U_A=-2\mathrm{.}11,U_B=-2\mathrm{.}89,$ and $U_R=-2\mathrm{.}63.$

Calculate:

a$.$ The corresponding mode shares.

b$.$ The effect of a policy that is expected to cause a change $U_R=0\mathrm{.}20$

and $U_B=0\mathrm{.}25$ on the mode shares.