1 A compound curve needs to be designed using the informatio

1. A compound curve needs to be designed using the information below (see sketch). Compute all of the elements of the compound curve (T1, T2, Ri, R2, I. Ii, 12) and compute the elements of each curve (R, I, T, LC & A). NOT TO SCALE PI 1 (A) = 650 00\' 00\" PCC PT PC R3 = 400.00, RI = 600.00, 11 (1)-450 00, 00\"

Solution

₂= -₁= 65⁰-45⁰= 20⁰

t₁ =R₁ tan₁/2=600 tan 45⁰/2=248.5’

t₂=400tan₂/2=400tan20⁰/2=70.53’

T₁=t₁+(t₁+t₂)sin₂/sin

     =248.52+(248.5+70.53)sin20⁰/sin65⁰

=368.92’

T₂=t₂+( t₁+t₂)sin₁/sin

=70.53+(248.5+70.53)sin45⁰/sin65⁰

=319.45’