tree driving by

I drive by a tree every day on my way to work and I'm not sure what it is.

It's a tree in someone's front yard. The leaves look pinnately compound, the trunk is about 2-3' in diameter, the entire tree is maybe 40-50' tall, and the most striking aspect is the huge pyramidal yellow inflorescences. July in northern Illinois. What could this be?

 

Check out Koelreuteria paniculata.

 

Hm, the flowers don't seem as "pyramidal" as I remember. Maybe it is just a really big sumac?!?

 

Too big for sumac. Maybe Ailanthus. Or Styphnolobium.

 

I thought it was late to be flowering...the yellow I saw while driving by was fruits. Apologies for low-quality photos, all I had with me was my phone.

 

Ailanthus altissima.

 

Thanks!