Chapter 1360
Interchanges
WSDOT Design Manual M 22-01.20
Page 1360-31
September 2021
Exhibit 1360-22 Off-Connection: Two-Lane, Tapered
Notes:
[1] For deceleration lane length LD, see Exhibit 1360-11.
[2] Point
A
is the point controlling the ramp design speed.
[3] For gore details, see Exhibit 1360-13.
[4] Lane and shoulder widths are shown for illustrative purposes. For ramp lane and shoulder widths,
see Exhibit 1360-6.
[5] Approximate angle to establish ramp alignment.
[6] Lane to be dropped or auxiliary lane with a minimum length of 1,500 ft with a 300-ft taper.
General:
For striping, see the
Standard Plans.
Chapter 1360
Interchanges
WSDOT Design Manual M 22-01.20
Page 1360-32
September 2021
Exhibit 1360-23 Off-Connection: Two-Lane, Parallel
Notes:
[1] For deceleration lane length LD, see Exhibit 1360-11.
[2] Point
A
is the point controlling the ramp design speed.
[3] For gore details, see Exhibit 1360-13.
[4] Lane and shoulder widths are shown for illustrative purposes. For ramp lane and shoulder widths,
see Exhibit 1360-6.
[5] Ramp stationing may be extended to accommodate superelevation transition.
[6] Lane to be dropped or auxiliary lane with a minimum length of 1,500 ft with a 300-ft taper.
General:
For striping, see the
Standard Plans
.
Chapter 1360
Interchanges
WSDOT Design Manual M 22-01.20
Page 1360-33
September 2021
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