ROADWAY DESIGN CALCULATIONS - TOLLWAY MAINLINE

(Based on Illinois Tollway 2020 Roadway Design Criteria Manual)

DOES PROJECT BEGIN-LIMIT FALL ON A TANGENT ?

CURVE
PI STA.
Δ =
D =
R =
T =
L =
E =
PC STA.
PT STA.



DOES PROJECT END-LIMIT FALL ON A TANGENT ?

DOES PROJECT BEGIN-LIMIT FALL ON A VERTICAL TANGENT ?

CURVE
VPC: STA
ELEV
G1 =
VPI: STA
ELEV
G2 =
VPT: STA
ELEV
SSD =
K =
L =

DOES PROJECT END-LIMIT FALL ON A VERTICAL TANGENT ?

RDC 1.6: DESIGN VEHICLE = SELECT

RDC 2.1: LEVEL OF SERVICE = SELECT

RDC 2.2: DESIGN SPEED = 70 mph

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