City of University Park issued the following announcement on July 7

As area residents and motorists know, work is well underway on a multi-year project to upgrade the City’s stormwater system and reduce storm runoff in the neighborhoods near Caruth Park. This construction involves the replacement of existing underground stormwater pipes with large concrete boxes underneath Southwestern and Hillcrest, and it requires the removal of a substantial amount of street surface. 

Portion of Hillcrest will soon be closed to all traffic

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By the middle of this month, construction will be completed for the segment that includes the intersection of Turtle Creek and Southwestern and the 3400 block of Southwestern. When the contractor reaches the intersection of Southwestern and Hillcrest, a portion of Hillcrest will be closed to all traffic. We anticipate this closure will begin the week of July 12. Weather permitting, this closure will last for six to eight months as work progresses north a block at a time on Hillcrest, between Southwestern and Colgate. To alert motorists, digital message boards have been positioned on Hillcrest at Northwest Highway and at Lovers Lane. As construction on this section of Hillcrest moves north, detour routes will change. As we get closer to the start of the 2021-22 school year, the City will work with HPISD on routes to impacted campus populations. As always, we thank you for your patience and cooperation!

Original source can be found here.