While on a smart motorway, what does a mandatory speed limit above the hard shoulder indicate?

Explanation: This sign indicates that the hard shoulder is being used as a running lane, and that it has a mandatory speed limit of 50 mph. The hard shoulder will still be used by broken down vehicles in this scenario, so look far ahead for any obstructions.

Category: Motorway rules (2021)

References: The Official DVSA Guide to Driving: Section 18, Highway Code: Rule 269