Pavement Rehabilitation: Layers

The quickest, simplest, and cheapest pavement rehabilitation is a thin overlay.  The photograph illustrates two thin overlays peeling off an original surface. We have some issues with multiple simple overlays, primarily: The overlays flatten the surface and slow storm water drainage The curb heights are reduced Each overlay layer has […]

Parking Reconfiguration

A pavement rehabilitation project is the best time to review the existing parking configuration.  For example, the Google Earth aerial image is overlaid in yellow by a proposed parking reconfiguration.  The backstory is a building expansion misaligned the fire lane and parking lot. The Zimmer solution removed three long divider […]

Streetscapes: Inlaid Decorative Patterns

We have made posts about a streetscape product called StreetPrint XD, a solid plastic sheet (a thermoplastic material) melted into a pavement surface. There is a similar product called DuraTherm. It is a preformed thermoplastic material that is inlaid into imprinted asphalt and heated in place using infrared heaters. When […]

Accessibility: Signage

During our travels, we see a lot of unique accessible signage.  Here is a big reinforced concrete post which appears to be durable.  Sometimes we find large bases are not buried deeply into the pavement but are just sitting on the surface.  For good resistance to toppling, a bollard should […]

Miscellaneous: Caught in the Act

Sometimes we are surprised to see one of our projects show up on Google Earth.  This happened for a parking lot reconfiguration project at North Star Mall in San Antonio.  We designed a reoriented parking lot by turning parking aisles 90 degrees to improve traffic flow; align parking with the […]

Accessibility: Accessible Sign Height

The American Disabilities Act Accessibility Guidelines (ADAAG) specifies accessible parking stall must have a permanent sign for each parking stall.  Without a sign, the stall is not considered an accessible stall.  In earlier ADAAG versions, the sign height must be visible when a vehicle parked in the stall.  The latest […]

Maintaining An Accessible Route

When a construction barrier or screen is placed on a sidewalk, an accessible route must be maintained.  The sidewalk width must be a minimum of four feet with five-foot passing areas every 200 feet (R302 Pedestrian Access Routes R302.3.1).   Zimmer Consultants photograph

Accessibility: No Ramps at Doors

According to the ADAAG, a manually operated door must have a five-foot flat (slopes at 2.1% or less) landing area.  The photograph shows original construction and a reversed ramp. The slope is in excess of 2.1%. To become compliant, the sidewalk will have to be replaced.  Zimmer Consultants photograph

Installing Pavers: Lock them in Place!

Brick pavers are frequently used for crosswalks and pavement accents.  Over time and traffic, we have seen pavers shift.  The pavers in the photograph have been pushed in the direction of traffic (to the right).  The center, herringbone pattern shifted causing the running bond border to become loose.  There is […]