Title: Los Alamitos Circle
Content:  The Los Alamitos Traffic Circle, informally known as the Long Beach Traffic Circle (or just the Traffic Circle, as there is only 1 other high volume traffic circle in Southern California), is a roundabout at the intersection of Lakewood Boulevard (State Route 19), Pacific Coast Highway (State Route 1/former U.S. Route 101 Alternate) and Los Coyotes Diagonal in Long Beach, California. The intersection was originally constructed as a traffic circle in 1930 and reconstructed as a modern roundabout in 1993.
Title: Los Alamitos Circle
Content:  In 1930, German engineer Werner Ruchti was contracted to design the traffic circle, which was to be based on European models. Construction was expedited in order to accommodate the increased vehicle traffic that was expected with the 1932 Summer Olympics, held in Los Angeles, as many of the aquatic and rowing events were to be held in Long Beach. The Los Alamitos Traffic Circle was one of the first of its kind to be constructed in the United States, and prior to their truncation, was also an end point of US 6 (which connects Provincetown, Massachusetts some 3227 mi to the east) and US 91.
Title: Garces Memorial Circle
Content:  The Circle was originally built as a part of US 99 in approximately 1932. A large 1939 sculpture of Father Francisco Garces by John Palo-Kangas rests inside the circle. At 280’ of inner diameter, the Garces Memorial Traffic Circle is a smaller sibling of the similar 360’ inner-diameter 1930 Long Beach Traffic Circle located in Long Beach.
Title: Roundabout
Content:  famous Columbus Circle, which was built in 1905. In 1907, architect John McLaren designed one of the first American traffic circles for both autos and streetcars (trams) in the Hanchett Residence Park in what is now San Jose, California. The first British circular junction was built in Letchworth Garden City in 1909. Circular intersections were built in the United States, though many were large-diameter 'rotaries' that enabled high speed merge and weave maneuvers. Older-style traffic circles may control entering traffic by stop signs or traffic lights. Many allow entry at higher speeds without deflection, or require a stop and a 90-degree turn to enter. Because these circumstances caused a lot of vehicle collisions, construction of traffic circles and rotaries ceased around the world in the 1950s, and some were removed.
Title: Los Alamitos Circle
Content:  Today the circle handles over 60,000 vehicles a day, mostly commuters from Orange County in the south heading to jobs in the South Bay area of Los Angeles County. The roadway is now owned by the State of California but managed by the City of Long Beach in cooperation with the California Department of Transportation (Caltrans). The city provides landscaping and vehicle code/traffic enforcement, while the state provides road maintenance. In addition to the main traffic circle, there is also an Outer Traffic Circle that is concentric with the main roundabout. The artery Atherton Street ends at the Outer Traffic Circle and does not continue toward the main roundabout
Title: Columbus Circle
Content:  circle was too narrow for the normal flow of traffic. Eno also wrote of a permanent plan, with the safety zones on the outside as well as clearly delineated pedestrian crossings. The redesign marked the first true one-way traffic circle to be constructed anywhere, implementing the ideas of Eugène Hénard. In this second scheme, the public space within the circle, around the monument, was almost as small as the monument's base. The rotary traffic plan was not successful. A New York Times article in June 1929 stated that the "Christopher Columbus [monument] is safe and serene, but he's the only thing in the Circle that is." At the time, there were eight 
Title: Columbus Circle
Content:  By the late 20th century, it was regarded as one of the most inhospitable of the city's major intersections, as the interior circle was being used for motorcycle parking, and the circle as a whole was hard for pedestrians to cross. In 1979, noted architecture critic Paul Goldberger said that the intersection was "a chaotic jumble of streets that can be crossed in about 50 different ways—all of them wrong." In 1987, the city awarded a $20 million contract to Olin Partnership and Vollmer Associates to create a new design for the circle. The circle was refurbished in 1991–1992 as part of the 500th-anniversary celebration of Columbus's arrival in the Americas. In 1998, as a result of the study, the circular-traffic plan was reinstated, with all traffic going around the circle in a counterclockwise direction. The center of the circle was planned 
Title: Berlin Circle (traffic circle)
Content:  The circle was created in 1953 when Route 73 was created, and marked the crossroads of two state highways, three county roads, four local roads and a railway. The circle was constructed at a time when Berlin was largely rural and the land in the area used primarily for agricultural purposes. By 2002 and with increased suburbanization of the area, the circle became notorious for its congestion and traffic accidents, and for flooding caused by the Great Egg Harbor River. New Jersey had been quite fond of traffic circles starting in 1927, when the Airport Circle in Pennsauken Township opened to traffic on July 1, 1927, as the first such traffic rotary in the United States. While the state had as many as 67 traffic circles at its peak, projects initiated by the NJDOT since the mid-1970s had reduced the count to 37 by 1999.
Title: Latham Circle
Content:  The circle takes the name from the hamlet of Latham, of which the circle is close to the exact center. The circle was originally built as a large traffic circle in 1934 and in 1958 an underpass was built to give motorists the option to skip the circle and continue on US 9. The traffic circle was remodeled in 2002 to have true roundabout characteristics. US 9 travels north&ndash;south under the circle while one-way access roads on either side carry traffic to the circle for connection to NY 2, which travels east&ndash;west.
Title: Carroll Park, Long Beach, California
Content:  Carroll Park was the first planned housing tract in Long Beach. Homes were originally constructed here between 1898 and 1923. At least a dozen houses and three barns built during his brief tenure here still stand. In all, about seventy-five houses in the Park predate 1940. Several old barns survive from an earlier time. Carroll Park was built at the turn of the century by John Carroll, and was the first planned housing tract in Long Beach, California. The Park was designated a Historic Landmark District in 1982, just shortly after the City recognized the need to preserve Long Beach’s treasured communities.* The Park's unique circular layout gives it a seclusion 

Question: who designed the traffic circle in long beach ca?
Answer: German engineer Werner Ruchti.
Werner Ruchti.