The sign is called "Time indications hours restricted to weekdays" (1042-50). This sign indicates that certain traffic regulations, such as parking restrictions or speed limits, apply only on weekdays, specifically from Monday to Friday.

When you see this sign, it is important to note the specific times during which the restrictions are in effect, which are usually indicated on the sign itself. For example, if the sign states "Mon-Fri 8:00 - 18:00," this means that the restrictions are in place from 8 AM to 6 PM on weekdays, and outside of those hours, you are allowed to park or drive without adhering to the restrictions.

Always ensure to pay attention to such signs as they help in understanding the rules that vary by time and day, facilitating safe and lawful driving. If you have further questions about related driving rules or situations, feel free to ask!