Rt 1 from Bridge****t to Darien?

I've got to make a quick decision (before this Saturday 7/7) about whether 
to bike or take the train from the Bridge****t Ferry Terminal to my son's
new 
house in Darien, CT.  I've ridden all of Rt. 1 from Bridge****t north to 
Narragansett, RI, but have never ridden this ****tion.  Can anyone tell me
if 
the 20 mile segment from Bridge****t south to Darien is more like a highway

or more like a busy turnpike?

Thank you!