Final answer:
The local or regional traffic authority is responsible for placing signage indicating restricted roadways, and drivers should contact them for clarification on road restrictions.
Step-by-step explanation:
When it comes to road signage, interpretation can vary depending on the country and local laws. However, a common principle across many countries is the use of symbols to convey information quickly to drivers. Without seeing the specific signage mentioned in this context, one can assume that a 'restricted roadway' sign indicates a limitation to access for certain vehicles or during certain times. To interpret road signs effectively, one should be familiar with local traffic laws and regulations.
Generally, in the case when a road is restricted, it is the responsibility of local or regional traffic authority to place appropriate signage to inform drivers of any restrictions. For instance, road works, temporary closures, or permanent restrictions all need to be clearly marked. Drivers should contact the local traffic authority or transportation department if they have questions or concerns about a restricted roadway. It is also common that in the event of unexpected road conditions or emergencies, law enforcement or traffic officials will be present to direct traffic and answer questions.