Value of Dual MSCE/MURP Degrees

Increasingly, universities are offering dual degree programs where students can earn MSCE/MURP degrees simultaneously, usually in transportation engineering/planning. Typically, MSCE graduates would expect to receive a higher entry-level salary than MURP graduates, implying that the MSCE degree is more valuable than the MURP degree. In theory, MSCE/MURP graduates have additional skills to offer than graduates posessing only an MSCE or MURP degree, and thus should earn more. However, I'm wondering if this will actually play out in practice. Will these graduates actually earn more, or will employers discount the value of the MURP degree and only pay the going rate for an MSCE or MURP graduate?