Your preliminary title report would tell you whether the property Provides you an ingress/eagress easement which may be reciprocal to: a) the roadway property (b the property in question and c) all the properties adjoining the roadway (and possibly in the development.Once you've gotten to the point of figuring out who owns what and what land is encumbered by an easement to whom then you'll also want to try and find out if there is an operating and maintenance agreement on file with the governmental agency that issues the original parcel/lot approvals.And to answer your question, yes developers create separate roadway parcels and depending on the time either keep ownership with an operating agreement dictating use and maintenance (and perhaps paying property taxes, deed them to a local government (although without a requirement for maintenance (sometimes) or make them part of an hoa.I bought the property, and worked through tracking down ownership, getting lots splits and correcting the easement and creating an operating agreement for maintenance with the neighboring property owners that also benefited.

In addition to over 4 miles of existing paved roadway and 8 miles of gravel roadway, the island offers strength in its utility connections and capacity.

Signs are now picked up on selected roads on Tuesdays, Wednesdays and Thursdays.The program covers 63 streets — or about 200 miles of roadway — county officials said.

My plan would not be to install any road ways, but to just layout the lots, covenants and easements.  

You can't buy advertising that good, especially if you park near the roadway of the mall!

Tour the major roadways like Rt 1, 610, 630, & 17...you should immediately notice what I am talking about.  

It's based on a lot of factors, such as amenities offered (i.e. fitness center, clubhouse, swimming pool, etc); costs to operate/maintain common areas (i.e. landscaping, electricity for common light fixtures, gates, repairs to roadways, parking lots, etc); cost of any insurance that's required; size and age of the property and infrastructure; planning for future capex projects for the property; etc.  

Zoning will be your first hurdle then getting Utilites and roadways to your land depending where all the main service lines are.

Then on the new inspection date the inspector was late.Giant hassle.They want all the area that is a solid surface because there are limits to how much of the parcel is allowed to be impervious surface - control of precipitation runoff is a big thing now, even with detentions basins there are roadways still flooding. 

Through their internal investigation Caltrans determined the only reason they have kept the old roadway was to provide access to the adjacent properties.