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Provincial Highway 66
Provincial Highway 66
台66線
東西向快速公路觀音大溪線; (East-West Expressway, Guanyin-Daxi Line)
Route information
	Maintained by Directorate General of Highways
Length	27.259 km (16.938 mi)
Existed	20 January 2001–present
Major junctions
West end	Prov 61 in Guanyin
	Prov 15 in Guanyin; Prov 31 in Xinwu; Nat 1 in Pingzhen; Prov 1 in Pingzhen;
East end	Cty 112A in Daxi
Location
Country	Taiwan
Highway system
	Highway system in Taiwan;

Provincial Highway 66 (Chinese: 台66線) is an expressway, which begins in Guanyin District, Taoyuan City on Provincial Highway 61 and ends in Daxi District, Taoyuan City, on County Road 112A.

Major urban areas along the route

City	Location	km^[1]	Mile	Exit	Name	Destinations	Notes
Taoyuan City	Guanyin	0.000	0.000	0	Guanyin	Prov 61 – Dayuan, Yong'an, Xinfeng
		1.018	0.633			Prov 15 – Dayuan, Yong'an, Xinfeng
		2.038	1.266			TR 89 – Guanyin, Baosheng
						TR 94 – Guanyin, Baosheng
		5.111	3.176	5	Guanyin 1	Cty 115 – Guanyin, Xinwu	Interchange
		7.185	4.465			TR 84 – Xinpo, Xinwu
	Xinwu	8.458	5.256			TR 82 – Fuyuan, Xinwu
		9.000	5.592	West end of freeway
		10.800	6.711	10	Xinwu	Cty 114 (Zhongshan East Road) – Zhongli, Xinwu
		12.400	7.705	12	Xinwu 1	Prov 31 north – THSR Taoyuan Station, Yangmei District	Eastbound exit and westbound entrance
		13.600	8.451	13	Xinwu 1	Prov 31 north – THSR Taoyuan Station, Zhongli District	Westbound exit and eastbound entrance
	Yangmei	15.221	9.458	-		TR 102 – Xinrong, Gaorong	Westbound exit and eastbound entrance
	Pingzhen	17.738	11.022	18	Pingzhen System	Nat 1 – Hsinchu, Taipei
		18.702	11.621	19	Pingzhen 1	Prov 1 (Yanping Road) – Zhongli, Pingzhen	Eastbound exit and westbound entrance
		20.253	12.585	20	Pingzhen 2	Cty 113 (Zhongfeng Road) – Zhongli, Longtan
		23.181	14.404	23	Pingzhen 3	Cty 113A (Jinling Road) – Zhongli, Pingzhen, Longtan
	Daxi	27.259	16.938	27	Daxi End	Cty 112A (Yongchang Road) to Nat 3 – Daxi
1.000 mi = 1.609 km; 1.000 km = 0.621 mi Incomplete access