The most well designed routing guides are going to fail. Even seasoned supply chain teams working with a roster of reliable service providers are going to design routing guide failures into their transportation execution strategy. This article discusses three common pitfalls that create gaps in routing guides in order to highlight the need to develop a plan to secure extra capacity at times – specifically about five percent of the time for the most well run supply chains. The actual point is to suggest that there is an unfilled space between the end of the routing guide and the auction system that deserves a strategic design. Even a quick review of these pitfalls should give your team an idea as to how many times per year you or your customers will need to source alternative capacity.