Here is the link to the site https://mutcd.fhwa.dot.gov/kno_11th_Edition.htm The new version is 1,157 pages long, if you wish to purchase hard copies, they are available from various online sources, contained in a set of 3 books. The state of Iowa has two years from the January 18, 2024 effective date to adopt the new version.
On the landing page of the provided link in this story, there is a 2009 MUTCD redline with the 11th edition changes. This will help in reviewing what changes were made in the manual.