SR 3A was defined by number in 1935 state law, chapter 17341, approved May 27, 1935: • A certain road described as extending from the intersection of Orange Avenue and Fairbanks Avenue in
Winter Park, then Southerly on Orange Avenue to its intersection with
State Road 22 in the City of
Orlando. This was established to keep this section of former
SR 3, which was to be bypassed around 1937 along the Orlando Shortcut (now Orlando Avenue) and Mills Avenue, a state road (and probably part of
US 17/
US 92). South of
SR 22 (Colonial Drive), Orange Avenue was still part of
SR 2. SR 3A was extended in both directions by number in 1939 state law chapter 19049, approved May 12, 1939: • Beginning at the point where the new location of
State Road No. 3 intersects with the old location near the south line of the Town of
Lake Maitland, thence along said old location thereof and along Park, Fairbanks and Orange Avenue in
Winter Park, Orange Avenue in
Orlando, and such route as may be selected by the
State Road Department from Orange Avenue to Kuhl Avenue in
Orlando, to the South city limits thereof, thence along the present
Orlando and
Kissimmee road to the county-line between
Orange and
Osceola Counties. This kept the rest of old
SR 3 in
Winter Park in the State Road system, as well as old
SR 2 south of
SR 22 (Colonial Drive), which was bypassed around 1939. Some state maps show SR 3A on old
SR 2 north of
Kissimmee in
Osceola County and through
Maitland into
Seminole County, but it doesn't appear that these were added, unless they were added in 1941 when most of the through roads in
Orange County were designated as State Roads. In the
1945 renumbering, most of SR 3A became SR 527; SR 527 extended south into
Osceola County but not north to
Seminole County. The part between Orlando Avenue and the Park Avenue/Fairbanks Avenue intersection in
Winter Park instead became part of
SR 426, and was a gap in SR 527. ==Major intersections==