Earlier editions: 2026-07
Title 10 — Vehicles and Traffic
Union City Municipal Code Ch. 10.48 Speed Zones
Union City Municipal Code · 2026-10 edition · updated 2026-10-04 · Union City
Cite as: Union City Municipal Code Chapter 10.48 · Text as of 2026-10-04
§ 10.48.010. Increasing State speed limit in certain zones.¶
It is determined upon the basis of an engineering and traffic investigation that the speed permitted by State law upon the following streets is less than is necessary for safe operation of vehicles thereon by reason of the designation and signposting of said streets as through highways and (or) by reason of widely spaced intersections, and it is declared that the prima facie speed limit shall be as hereinafter set forth in this chapter on those streets or parts of streets designated in this chapter when signs are erected giving notice thereof.
(Ord. 69-67 § 15, 1967)
§ 10.48.020. Decrease of State law maximum speed.¶
It is determined upon the basis of an engineering and traffic investigation that the speed permitted by State law outside of business and residence districts as applicable upon the following streets is greater than is reasonable and safe under the conditions found to exist upon such streets, and it is declared that the prima facie speed limit shall be as set forth in this section on those streets or parts of streets designated as follows when signs are erected giving notice thereof:
| SPEED LIMITS |
|---|
| 15.1 Almaden Boulevard: Alvarado-Niles Road to Amaral Street 25 MPH |
| 15.2 Almaden Boulevard: Alvarado-Niles Road to Tropics Mobile Home Park 25 MPH |
| 15.3 Alvarado Boulevard: Union City Boulevard to New Haven Street 35 MPH |
| 15.4 Alvarado Boulevard: New Haven Street to Dyer Street 35 MPH |
| 15.5 Alvarado Boulevard: Dyer Street to Fremont city limits 40 MPH |
| 15.6 Alvarado-Niles Road: Almaden Boulevard to Sherman Drive 40 MPH |
| 15.7 Alvarado-Niles Road: Sherman Drive to Fremont city limits 35 MPH |
| 15.8 Arizona Street: Hop Ranch Road to Copa del Oro 25 MPH |
| 15.9 Bettencourt Way: Union City Boulevard to Whipple Road 35 MPH |
| 15.10 Brockway Street: Rocklin Drive to Lowry Road 25 MPH |
| 15.11 Cabello Street: Dyer Street to Regents Boulevard 25 MPH |
| 15.12 Cabello Street: Regents Boulevard to Jean Drive 25 MPH |
| 15.13 Central Avenue: Alvarado-Niles Road to Whipple Road 45 MPH |
| 15.14 Claremont Street: Almaden Boulevard to Medallion Drive 25 MPH |
| 15.15 Clover Street: Decoto Road to Astor Street 25 MPH |
| 15.16 Deborah Drive: Dyer Street to Delores Drive 25 MPH |
| 15.17 Decoto Road: Fremont City limits to Alvarado-Niles Road 35 MPH |
| 15.18 Decoto Road: Alvarado-Niles Road to Mission Boulevard 35 MPH |
| 15.19 Delores Drive: Union City Boulevard to Jean Drive 25 MPH |
| 15.20 Delores Drive: Jean Drive to Meteor Drive 25 MPH |
| 15.21 Dowe Avenue: Alvarado-Niles Road to Pacific Street 35 MPH |
| 15.22 Dowe Avenue: Pacific Street to Atlantic Street 35 MPH |
| 15.23 Dyer Street: Alvarado-Niles Road to Whipple Road 40 MPH |
| 15.24 Dyer Street: Alvarado-Niles Road to Alvarado Boulevard 35 MPH |
| 15.25 Dyer Street: Alvarado Boulevard to Union City Boulevard 35 MPH |
| 15.26 E Street: Eleventh Street to Mission Boulevard 25 MPH |
| 15.27 Eleventh Street: D Street to Decoto Road 25 MPH |
| 15.28 Galaxy Drive: Alvarado Boulevard to Meteor Drive 30 MPH |
| 15.29 H Street: Alvarado-Niles Road to 15th Street 25 MPH |
| 15.30 H Street: 15th Street to Decoto Road 25 MPH |
| 15.31 Hartnell Street: Alvarado-Niles Road to Colgate Drive 25 MPH |
| 15.32 Horner Street: Union City Boulevard to east end 25 MPH |
| 15.33 Horner Street: Union City Boulevard to west end 25 MPH |
| 15.34 Industrial Parkway Southwest: Whipple Road to north city limits 35 MPH |
| 15.35 Ithaca Street: Whipple Road to Hayward city limits 25 MPH |
| 15.36 Jean Drive: Dyer Street to Regents Boulevard 25 MPH |
| 15.37 Lowry Road: Regents Boulevard to Union City Boulevard 25 MPH |
| 15.38 Lowry Road: Fremont city limits to Regents Boulevard 35 MPH |
| 15.39 Mann Avenue: Alvarado-Niles Road to Perry Road 30 MPH |
| 15.40 Medallion Drive: Whipple Road to Sheffield Lane 25 MPH |
| 15.41 Meteor Drive: Dyer Street to Delores Drive 30 MPH |
| 15.42 Mission Boulevard: Fremont city limits to Decoto Road 50 MPH |
| 15.43 Mission Boulevard: Decoto Road to Hayward city limits 40 MPH |
| 15.44 Ninth Street: A Street to Decoto Road 25 MPH |
| 15.45 Perry Road: Decoto Road to Farrol Avenue 25 MPH |
| 15.46 Perry Road: Decoto Road to Tartarian Way 25 MPH |
| 15.47 Railroad Avenue: Whipple Road to D Street 30 MPH |
| 15.48 Regents Boulevard: Union City Boulevard to Dyer Street 25 MPH |
| 15.49 Regents Boulevard: Dyer Street to Lowry Road 25 MPH |
| 15.50 Rocklin Drive: Regents Boulevard to Union City Boulevard 25 MPH |
| 15.51 Royal Anne Drive: Alvarado-Niles Road to Decoto Road 25 MPH |
| 15.52 San Andreas Drive: North end of Santa Maria Drive to south end of Santa Maria Drive 25 MPH |
| 15.53 San Andreas Drive: Santa Maria Drive to Santa Susana Way 25 MPH |
| 15.54 Santa Maria Drive: Alvarado-Niles Road to San Andreas Drive 25 MPH |
| 15.55 Seventh Street: Bradford to Mission Boulevard 35 MPH |
| 15.56 Seventh Street: Decoto to Bradford 25 MPH |
| 15.57 Sherman Drive: Alvarado-Niles Road to San Andreas Drive 25 MPH |
| 15.58 Sixth Street: Whipple Road to Decoto Road 25 MPH |
| 15.59 Skylark Drive: Decoto Road to Osprey Drive 25 MPH |
| 15.60 Smith Street: Union City Boulevard to Dyer Street 25 MPH |
| 15.61 Tamarack Drive: Ithaca Street to Mission Boulevard 25 MPH |
| 15.62 Tamarack Drive: Mission Boulevard to Basswood Avenue 25 MPH |
| 15.63 Tenth Street: D Street to Decoto Road 25 MPH |
| 15.64 Tidewater Drive: Smith Street to end 25 MPH |
| 15.65 Union City Boulevard: Kohoutak Way to Bettencourt Way 35 MPH |
| 15.66 Union City Boulevard: Bettencourt Way to Horner Street 35 MPH |
| 15.67 Union City Boulevard: Horner Street to Alvarado Boulevard 35 MPH |
| 15.68 Union City Boulevard: Alvarado Boulevard to Dyer Street 45 MPH |
| 15.69 Union City Boulevard: Jean Drive to south city limits 45 MPH |
| 15.70 Union Square: Decoto Road to Alvarado-Niles Road 25 MPH |
| 15.71 Western Avenue: Alvarado-Niles Road to Pacific Street 35 MPH |
| 15.72 Western Avenue: Pacific Street to Atlantic Street 35 MPH |
| 15.73 Whipple Road: Mission Boulevard to Railroad Avenue 25 MPH |
| 15.74 Whipple Road: Railroad Avenue to Amaral Street 40 MPH |
| 15.75 Whipple Road: Dyer Street to Union City Boulevard 40 MPH. |
(Ord. 69-67 § 15.1, 1967; Ord. 69.4-70 § 1, 1970; Ord. 69.5-70 § 1, 1970; Ord. 69.6-71 § 1, 1971; Ord. 69.7-71 § 1, 1971; Ord. 69.8-72 § 1, 1972; Ord. 69.9-72 § 1, 1972; Ord. 69.10-74 § 1, 1973; Ord. 118-74 § 1, 1974; Ord. 121-74 § 1, 1974; Ord. 128-75 § 1, 1975; Ord. 132-75 § 1, 1975; Ord. 141-75 § 1, 1975; Ord. 150-76 § 1, 1976; Ord. 171-78 § 1, 1978; Ord. 188-80 § 1, 1980; Ord. 197-80 § 1, 1980; Ord. 198-81 § 1, 1981; Ord. 215-82 § 1, 1982; Ord. 297-87 § 1, 1987; Ord. 312-88 § 1, 1988; Ord. 383-92 § 1, 1992; Ord. 521-98 § 1, 1998; Ord. 529-98 § 1, 1998; Ord. 558-00 § 1, 2000)
§ 10.48.030. Decrease of State maximum speed law between districts.¶
Where the State maximum speed law is applicable for a distance of not exceeding two thousand feet in length between districts, either business or residence, and it is determined upon the basis of an engineering and traffic investigation that the speed permitted by State law on portions of streets which are not State highways is greater than is reasonable or safe under the conditions found to exist upon the described portions of such streets, and it is hereby declared that the prima facie speed limit shall be as herein set forth on those portions of streets herein designated when signs are erected giving notice thereof.
(Ord. 69-67 § 15.2, 1967; amended during 1990 republication)
§ 10.48.040. Regulation of speed by traffic signals.¶
The City Traffic Engineer is authorized to regulate the timing of traffic signals so as to permit the movement of traffic in an orderly and safe manner at speeds slightly at variance from the speeds otherwise applicable within the district or at intersections and shall erect appropriate signs giving notice thereof.
(Ord. 69-67 § 15.3, 1967)
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