Collocations for restricted - adj.

be
become
The US may become more restricted in its use of economic sanctions.

feel
She felt restricted in her uniform.

remain

extremely, fairly, very, etc.
greatly, heavily (esp. BrE), highly, seriously (esp. BrE), severely, tightly
New heavy industries were concentrated in tightly restricted areas.
He has a severely restricted diet.

increasingly
largely
relatively
apparently
normally, typically, usually
unduly (esp. BrE)
Access to higher education has been unduly restricted for people with disabilities.

to
Access to the documents remains restricted to civil servants.

Restricted is used with these nouns:
access, airspace, circulation, diet, franchise, mobility, range, stock, vocabulary