The StreetPave framework is based on the Portland Cement Association (PCA) concrete pavement design method developed during the mid-20th century. The framework has proven reliable for many roadway applications and has been widely used by engineers for decades. However, like any engineering model, it relies on assumptions that introduce limitations.

One key limitation is the simplified structural representation of the slab system. The design equations are derived from classical flat plate theory and empirical calibration rather than full numerical simulation. Real concrete slabs may experience behaviors such as curling, warping, partial loss of support, and nonlinear foundation response that are not captured in the simplified analytical approach.

The framework also represents joint performance and load transfer in an overly simplified manner. While the StreetPave framework considers doweled and undoweled joints, the model does not explicitly simulate the mechanics of dowel grouping action, joint opening, load footprint, and other important details. Instead, these effects are incorporated through generalized assumptions and empirical relationships.

Traffic loading is similarly simplified. The StreetPave framework relies on standard axle load categories and cumulative traffic estimates rather than detailed axle load spectra or specialized wheel loads. This approach works well for many roadway applications but will not well represent complex loading environments such as industrial facilities, logistics yards, or specialized heavy equipment operations.

In addition, the design framework focuses primarily on a limited set of pavement distress mechanisms, particularly fatigue cracking and faulting. Other factors that influence slab performance, such as environmental effects, are addressed indirectly or through conservative assumptions.

For these reasons, the StreetPave framework should be viewed as a practical engineering design tool rather than a comprehensive simulation of slab behavior. Engineers should always apply professional judgment and consider project-specific conditions when using the framework for pavement design.