· Due to constructability issues, incorporate guidance in the Design Manual to limit combinations of:
‒ severe skew with crowned roadway section
‒ variable superelevation with crowned roadway section
‒ severe skew with vertical curve
· Investigate the possibility of using a constant superelevation instead of normal crown if the heavy skew cannot be mitigated, discuss with Roadway
· Collaborate with Construction to require contractors to use proper equipment to accommodate heavy skews with normal crowns (Bid-Well screeds are capable of handling skews of this magnitude); possibly require a skew bar kit; develop a Project Special Provision to address site specific conditions
Issues:
Large gap present between outside edge of superstructure and the corner of the MSE wall that ties into the turned-forward wings; the gap is amplified by the severe skew; will require fall protection (fencing)
Action Item:
Collaborate with Geotech to develop a policy for the layout of MSE walls and end bent wing walls when MSE’s are used
