Changes
add FFH as per edit request
{{#switch:{{{type|}}}
|I|Interstate|Future={{#switch:{{{state|}}}
|HI=Interstate H-{{{route}}}
|PR=Interstate PR{{{route}}}
|#default=Interstate {{{route}}}{{#if:{{{state|}}}| ({{StateName|{{{state}}}}})}}
}}
|I-Spur=Interstate {{{route}}} Spur{{#if:{{{state|}}}| ({{StateName|{{{state}}}}})}}
|US|US 1926|US 1948|US 1961=U.S. Route {{{route}}}{{#if:{{{state|}}}| in {{#if:{{{dab|}}}|{{{dab}}}, |}}{{StateName|{{{state}}}}}}}
|US-Alt|US-Bus|US-Byp|US-Conn|US-Spur|US-Truck|US 1926-Alt|US 1926-Bus|US 1926-Byp|US 1926-Conn|US 1926-Spur|US 1926-Truck|US 1948-Alt|US 1948-Bus|US 1948-Byp|US 1948-Conn|US 1948-Spur|US 1948-Truck|US 1961-Alt|US 1961-Bus|US 1961-Byp|US 1961-Conn|US 1961-Spur|US 1961-Truck=U.S. Route {{{route}}} {{#switch:{{{type|}}}
|US-Alt|US 1926-Alt|US 1948-Alt|US 1961-Alt=Alternate
|US-Bus|US 1926-Bus|US 1948-Bus|US 1961-Bus=Business
|US-Byp|US 1926-Byp|US 1948-Byp|US 1961-Byp=Bypass
|US-Conn|US 1926-Conn|US 1948-Conn|US 1961-Conn=Connector
|US-Spur|US 1926-Spur|US 1948-Spur|US 1961-Spur=Spur
|US-Truck|US 1926-Truck|US 1948-Truck|US 1961-Truck=Truck
}}{{#if:{{{state|}}}| ({{#if:{{{dab|}}}|{{{dab}}}, }}{{StateName|{{{state}}}}})}}
|US-Scenic|US 1926-Scenic|US 1948-Scenic|US 1961-Scenic=U.S. Route {{{route}}} Scenic
|FFH={{#ifexist: Forest Highway {{{route}}} |Forest Highway {{{route}}} |Forest Highway }}
|#default={{Infobox road/{{{state}}}/link {{{1}}}
|num={{{2}}}
|denom={{{denom|}}}
|county={{{county|}}}
|dab={{{dab|}}}
}}}}
|I|Interstate|Future={{#switch:{{{state|}}}
|HI=Interstate H-{{{route}}}
|PR=Interstate PR{{{route}}}
|#default=Interstate {{{route}}}{{#if:{{{state|}}}| ({{StateName|{{{state}}}}})}}
}}
|I-Spur=Interstate {{{route}}} Spur{{#if:{{{state|}}}| ({{StateName|{{{state}}}}})}}
|US|US 1926|US 1948|US 1961=U.S. Route {{{route}}}{{#if:{{{state|}}}| in {{#if:{{{dab|}}}|{{{dab}}}, |}}{{StateName|{{{state}}}}}}}
|US-Alt|US-Bus|US-Byp|US-Conn|US-Spur|US-Truck|US 1926-Alt|US 1926-Bus|US 1926-Byp|US 1926-Conn|US 1926-Spur|US 1926-Truck|US 1948-Alt|US 1948-Bus|US 1948-Byp|US 1948-Conn|US 1948-Spur|US 1948-Truck|US 1961-Alt|US 1961-Bus|US 1961-Byp|US 1961-Conn|US 1961-Spur|US 1961-Truck=U.S. Route {{{route}}} {{#switch:{{{type|}}}
|US-Alt|US 1926-Alt|US 1948-Alt|US 1961-Alt=Alternate
|US-Bus|US 1926-Bus|US 1948-Bus|US 1961-Bus=Business
|US-Byp|US 1926-Byp|US 1948-Byp|US 1961-Byp=Bypass
|US-Conn|US 1926-Conn|US 1948-Conn|US 1961-Conn=Connector
|US-Spur|US 1926-Spur|US 1948-Spur|US 1961-Spur=Spur
|US-Truck|US 1926-Truck|US 1948-Truck|US 1961-Truck=Truck
}}{{#if:{{{state|}}}| ({{#if:{{{dab|}}}|{{{dab}}}, }}{{StateName|{{{state}}}}})}}
|US-Scenic|US 1926-Scenic|US 1948-Scenic|US 1961-Scenic=U.S. Route {{{route}}} Scenic
|FFH={{#ifexist: Forest Highway {{{route}}} |Forest Highway {{{route}}} |Forest Highway }}
|#default={{Infobox road/{{{state}}}/link {{{1}}}
|num={{{2}}}
|denom={{{denom|}}}
|county={{{county|}}}
|dab={{{dab|}}}
}}}}