For these and other projects where new lanes were constructed, the physical design and construction of the lanes is similar to that of any full standard highway improvement, incorporating few trade-offs between lane width, shoulder width, access, and physical separation. A few operational facilities, including the I-10 Managed Lanes in Houston and the I-15 Express Lanes in San Diego, involved reconstruction of the corridor segments where the HOV lanes existed. As a result, their designs differ significantly as they required the retrofitting of highway corridors with constrained design settings and that included earlier design exceptions that were previously approved for a specific set of operation rules and requirements.
Of the 14 priced managed lane facilities that were operational in May 2012, all but one were built in corridors with pre-existing HOV lanes. DesignÄesign considerations for priced managed lanes will inevitably be driven by the corridors in which they are located. Table of Contents Priced Managed Lane Guide CHAPTER 6.