Pre-1945 state roads 391-396, 450-499

One useful source is a 1939 list published by the SRD. I had previously taken notes on all the laws, but this combines them in one handy booklet.

Note that many of the legislatively-defined routes were never built or never acquired by the state. This is especially true of higher numbers.

#	year	from	to	via (post-1945)
391	1939	181 west of McCall	173 at Placida	771
392	1939	5 near Greenfield	15 at Weeki Wachee	591 (unbuilt)
393	1939	15 in St. Petersburg	233 in Treasure Island	59th Street/Central Avenue
394	1939	140 in Hallandale	149 west of Hallandale	824 (now partly 858/Park Road)
395	1939	140 in Boca Raton	199 west of Boca Raton	808
396	1939	FEC Railway in Boca Raton	140 in Boca Raton	Camino Real
450	1939	25 at Lake Harbor	25 at Sixmile Bend	unbuilt/827
451	1939	25 at Ninemile Bend	143 in Belle Glade	unbuilt/Canal Street North
452	1939	69 at Cooks Hammock	500 south of Hines	357
453	1939	10 at Beacon Hill	6 south of Wewahitchka	386
454	1939	164 in La Belle	357 north of Denaud	78
455	1939	Biscayne Bay east of Princeton	205 southwest of Florida City	Southwest 248th Street/Southwest 102nd Avenue
456	1939	465 at South Clermont	2 south of Groveland	Log House Road/565B
457	1939	189 southeast of Hastings	14 at East Palatka	Cracker Swamp Road
458	1939	1 in DeFuniak Springs	60 north of DeFuniak Springs	7th Street/unbuilt
459	1939	22 at Floral City	36 east of Inverness	Old Floral City Road
	probably former alignment of 5
460	1939	36 east of Inverness	320 east of Inverness	unbuilt
461	1939	5 north of Inverness	318 northeast of Inverness	unbuilt
462	1939	79 east of Connersville	8 south of Frostproof	655 east of Connersville to east of Homeland (now 655A/559) Lake Hendry Road/700/Avon Park Cut Off Road east of Homeland to south of Frostproof
463	1939	Hernando	Lecanto	unbuilt
	also part of 74
464	1939	55 in Minneola	22 west of Clermont	561A
465	1939	Clermont	55 south of Clermont	Lakeshore Drive
466	1939	5 in Inverness	36 east of Inverness	470
467	1939	Gulf of Mexico west of Crystal River	74 east of Holder	unbuilt/491
468	1939	140 in Ormond Beach	4 in Ormond Beach	1 (later 306, now 40)
469	1939	9 south of Madison	500 southeast of Lamont	14/Sampala Lake Road/360/CR 328
470	1939	Lee	Madison-Lafayette County line	255/53
471	1939	1 east of Madison	Madison-Hamilton County line	6
	also part of 116
472	1939	Madison	Georgia	145
	also part of 106
473	1939	9 north of Madison	Georgia	146/228th Avenue
474	1939	Greenville	northwest of Greenville	140/Old Equipment Road
475	1939	1 east of Greenville	Georgia	150/140th Street
476	1939	Madison	Georgia	591/Rocky Ford Road
477	1939	1 east of Madison	Madison-Hamilton County line	Country Kitchen Road/254/Hickory Grove Road/150
478	1939	Madison	Madison-Lafayette County line	53
	also part of 106
479	1939	1 east of Lee	116 west of Blue Springs	Old Blue Springs Road
480	1939	Madison-Hamilton County line	Madison-Jefferson County line	150/146 (including 225th Avenue)
481	1939	1 in Olustee	147 south of Sanderson	John Mann Road
482	1939	49 north of Macclenny	154 at Cedar Creek	23B/23A/23C/Odis Yarbrough Road
483	1939	1 in Olustee	28 in Lulu	Lulu Road/County Line Road
484	1939	1 west of Sanderson	Baker-Union County line	Tiger Lake Road
485	1939	115 in Destin	115	unbuilt?
486	1939	east of Providence	Alachua-Columbia County line	241 east of Providence to Bland 236 Bland to Traxler unbuilt Traxler to Alachua-Columbia County line
487	1939	Hardaway	Bear Creek Road east of Wetumpka	268A/270 Hardaway to Greensboro 274 Greensboro to Sawdust 65/65B Sawdust to east of Wetumpka
	mostly part of 362
488	1939	Quincy	362 near Hardaway	268
489	1939	1 east of Chattahoochee	Georgia	Jinks Crossing Road
490	1939	Georgia	94 southeast of Havana	159/12 Georgia to Havana 153 southeast of Havana
491	1939	127 south of Quincy	east of Wetumpka	Spooner Road/Magnolia Farm Road
492	1939	135 south of Sawdust	Piney Grove Church	65A/65B/12/379/269B
493	1939	Georgia	352 east of Concord	157A
494	1939	50 north of Branford	122 west of White Springs	unbuilt/local roads along Suwannee River
495	1939	DeFuniak Springs	213 east of Eucheeanna	280
496	1939	143 southeast of Pahokee	143 northeast of Pahokee	715 (now 729)
497	1939	93 north of Gulf Beach	Fort McRee	292/Johnson Beach Road/unbuilt
498	1939	500 west of Blountstown	539 north of Gaskins	unbuilt
499	1939	4 northwest of Durbin	47 south of Julington Creek	Race Track Road