Jamil Herd is the rather laid-back Transit Advisor in SimCity 4. His role is to advise the player on how to better manage their city's Vehicular Traffic and Mass Transit. He also advices on capacity issues at Airports and Seaports, but is not responsible for advocating their construction, that task falls to Neil Fairbanks.
Jamil is of African-American descent and his language indicates that he grew up in a city in the Southern United States. An aversion to conflict is also shown when he states he doesn't wish to 'get under the collar of that gal in Finance.'
His role in SimCity 4 compared to the other advisors (Except for Camille Meadows) is rather small, focussing almost solely on Road Congestion and offering no useful help on how to fix it. His role and helpfulness were broadened in the Rush Hour expansion pack.
Korea/Thailand/Taiwan/Hong Kong (SKU 3) and China (SKU 4)
It is understood that the Advisors were changed in these versions, but their names are not known and the only evidence is blurry screenshots.
Japan (SKU 5)
Jimmy Rowe (ジミー ロウ) replaces Jamil Herd as the Transit Advisor in the Japanese version of SimCity 4.