听力原文： The City of Toddleston would like to make the following announcement to its residents. Beginning in June, construction along the main highway will begin for the next 3 weeks. This means that the freeway will be closed to all motorists at that time. Citizens who use the highway are encouraged to take Kyle side road instead. The construction is expected to be completed by no later than June 25. After that time, the highway will reopen and all residents are invited to make use of the newly renovated highway as they desire. Any questions or concerns should be directed to Mr. Gary Taylor at Town Hall. What is the purpose of the radio announcement?