Street-side presence of a small lot in need of privacy. Two pair of Sliding Driveway Gates access a circular drive, centered by a 4-post Entry gate with Arching Arbor. 
*( Sliding gate require only one motor.  Bi-parting sliding gates, where each gate leaf slides in opposite directions, requires two motors).

Sliding Driveway Gate #2-1, in Petaluma, CA (Sonoma County)

Single-Span Sliding Driveway Gate mounted onto an exposed steel frame.

--Illustrating a drive grade that slopes to the left, as well as down toward the house. The Gate must slide open to the left, toward the dropping grade. And because the slope is as much as 8", we have elected to follow that slope in the gate construction, lest we're left with a sizable gap.

Three options when presented with sloping grades:
1) Introduce a black rubber sweep dadoed to the bottom for drops of 2-6".
Seen here: Driveway Gate 10

2) 'Partial Racked', as shown here, where the top rail is level, and the bottom rail runs parallel to the slope, and consequently, the lower panels grows increasingly longer.  This acknowledges the visual slope, but does not confuse our eye with how a slope alone might distort the entire gate geometry.

3) Severe slopes leaves us no alternative but to create a full 'Full Racked', where all horizontal rails are parallel to the sloping grade. 
Seen here: Gate #78

-A Sausalito, CA property with Double Entry Driveway Gates sliding as a single span. Surface-mounted to a steel frame exposed on the yard side.

-- Once again, we illustrate the 'Partial racked' bottom rail, running parallel to a severe slope.  (Racked Bottom: Add 6%)

--One of the options for configuring sliding-gate rollers (maintaining the allignment of the Drive Gate) is shown below, with the rollers in contact with the gate. The disadvantage is that often the rollers will blemish the finish of a painted gate as they slide open and closed.

The original CPW Drive Gate.

This double-swing Driveway Gate in Ross, CA (Marin County), remains on the site in deference to one of the two-dozen families who steadfastly patronized Prowell's work in the late 70's and 80's, commissioning endless furnishings and interior make-overs. We were a young family then, with babies and an at-home mom and the loyalty of these patrons will never be forgotten.

And finally, The Driveway Gate #2 in Westchester, CA, illustrating how a Driveway Gate can often be configured to act as a pedestrian access as well, simply by off-setting the widths of the two gates. The larger gate is fixed in place with a cane bolt.