The final stretch of the Mark Clark Expressway across Johns and James islands will not be called Interstate 526, says Jim Armstrong, Charleston County’s director of transportation development.

Because the road is proposed as a low-speed parkway and not a traditional interstate, it will lose its designation and the interstate shield.

Armstrong gave council members an unscheduled update on the controversial project at Tuesday’s County Council meeting. The rest of the update included mostly procedural steps.

Reach Diane Knich at 937-5491 or on Twitter @dianeknich.