“In Switzerland, 30% of urban traffic consists of drivers searching for a parking space.”

The Swiss Federal Statistical Office compiles comprehensive statistics on road traffic, including vehicle-kilometres travelled, modal split, and commuting patterns. Available tables and indicators describe traffic volumes in urban areas but do not break out the proportion of car traffic that is searching for parking. There is no official indicator showing that 30% of urban traffic consists of drivers looking for a parking space.

The dataset provides information on parking spaces and parking garages in the city of St. Gallen, including parking type and number of parking spaces. It is relevant background on parking supply, but it does not address the share of traffic caused by parking search.

The article notes that "previous studies conclude that an average of 30% of the total traffic in downtown areas is caused by cruising for parking" but goes on to say that more recent GPS-based research finds lower values. It states that the study for Zurich "analyzes the extent of parking search behaviour" and reports an average parking search duration of 91 seconds in the surveyed central Zurich perimeter, rather than indicating that 30% of total traffic there is search traffic.

The project description explains that parking search traffic is an important cause of energy consumption and CO2 emissions in cities: "Parking search traffic is above all in cities an important cause of energy consumption and CO2 emissions." It cites Donald Shoup (2005) as summarising international literature, estimating "that search traffic makes up 30–40% of inner‑city traffic and that this slows down other traffic, leads to diversion traffic and makes inner‑city destinations less attractive." The Swiss study itself focuses on modelling search behaviour using GPS data from around 40,000 car legs, but the 30–40% figure is presented as an estimate from the existing (mainly Anglo‑Saxon) literature, not as a measured percentage for Switzerland.

The Federal Council’s strategy paper on sustainable urban mobility highlights that reducing car traffic and improving public transport, walking and cycling are key goals. It refers to issues such as congestion, air pollution and land use for parking, but it does not quantify what percentage of urban traffic is due to cruising for parking nor endorse a figure of 30% at the national level.

This peer-reviewed paper examines cruising-for-parking in downtown Zurich. It notes that the worst conditions occur around noon with "a maximum number of 30 searchers with an average search time of 13 min" but does not state that 30% of all traffic is cruising. Instead, it models cruising flows and occupancy to show how parking policy influences search traffic, indicating that searchers are a subset of traffic whose share varies by time and location.

The case study area is a central zone in Zurich. After calibration of the parking demand with real occupancy in public parking spaces, the results show that approximately 77% of the daily traffic uses public parking space, while 23% uses private parking. The authors estimate that “the total searching time is 6310 minutes, i.e., 105 hours in one day. In other words, each traveler spends on average 3.0 minutes searching for parking.” This is a local estimate for one inner-city area of Zurich; the paper does not state that 30% of urban traffic in Switzerland is search traffic.

The German Federal Environment Agency’s brochure on parking management explains: "Parking search traffic alone accounts for 30 to 40% of total inner‑city traffic." It further states: "A driver needs on average 10 minutes to search for a parking space and covers 4.5 km in the process. Drivers spend around 41 hours per year searching for a parking space – even though in car parks many spaces are free." These figures are presented as general inner‑city values and are not specific to Switzerland.

In describing the motivation for parking guidance systems, the article states: "Aside from commuter and recreational traffic on main roads, a large part of urban traffic stems from the search for parking spaces. We are talking about 30 to 40 percent of 'search traffic.' Since many cities have started to reduce the number of parking spaces, it's even more crucial that existing spaces can be used efficiently." This general statement attributes 30–40% of urban traffic to drivers searching for parking, but it is framed as a broad figure rather than specific, recent measurements for Swiss cities.

INRIX, a traffic analytics provider, reports for Germany: "According to a new INRIX study, which examines the economic costs of searching for parking, drivers in German cities spend an average of 41 hours per year searching for a parking space." The press release adds: "Parking search traffic costs Germans more than 40 billion euros per year" and "In Frankfurt, drivers spend 65 hours per year searching for parking." The release does not provide a figure for what percentage of urban traffic is parking search traffic, and it does not present data for Switzerland.

The Swiss Confederation’s information portal summarises data on traffic volumes and mobility behavior in Switzerland, drawing on federal statistics. It covers modal split, number of journeys, congestion, and environmental impacts of transport. The text provides no specific data on the proportion of urban traffic caused by parking search, and it does not state that 30% of urban traffic consists of drivers searching for a parking space.

Reporting on Swiss cities, the article says: "Since 2015, around 11,000 public car park spaces have been removed in cities and large towns across Switzerland, according to recent analysis reported by Tages Anzeiger." It notes that Zurich "has removed close to 7% of its public parking since 2015" and plans to remove a further 10,000 places by 2040, with the aim of cutting traffic into the city by 30%. The piece, however, does not quantify what share of current urban traffic consists of drivers searching for a parking space.

The infographic states: "Parksuchverkehr allein macht 30 bis 40 % des innenstädtischen Gesamtverkehrs aus." It also says that an average driver needs about 10 minutes to search for parking and drives 4.5 km in the process. This is a general statement about inner-city traffic, not specifically Switzerland.

This academic PDF discusses information systems for available parking spaces in cities and the effects of parking search on urban mobility. The accessible excerpt shows methodological and contextual material about parking search traffic, but it does not visibly substantiate the specific claim that 30% of urban traffic in Switzerland consists of parking-seeking drivers.

This booklet discusses traffic calming in tempo-30 zones and improving safety and quality of life in residential areas. It does not state that 30% of urban traffic in Switzerland consists of drivers searching for parking, so it is only indirect background on urban traffic management.

The handbook summarizes multiple studies and states: “In many city centres, 20–30% of the cars driving on the road at any given time are cruising for parking.” This 20–30% range is presented as a broad European or international estimate and is not tied specifically to Switzerland. No Swiss nationwide study is cited confirming that exactly 30% of urban traffic consists of drivers searching for a parking space.

An article on environmentally friendly mobility notes for European cities in general: "Studies estimate that around 30 percent of city traffic is caused by people driving around in circles looking for a parking space." The article uses this value as a generic estimate for European inner cities and does not refer specifically to Switzerland or to Swiss national statistics.

The page says that in Switzerland, according to a survey, parking search typically takes three to ten minutes in about half of cases, and ten percent take even longer. It also says that parking difficulties are common, but it does not provide a figure stating that 30% of urban traffic is made up of drivers searching for parking.

Urban planning literature frequently attributes to Donald Shoup and colleagues the estimate that roughly 30% of traffic in congested downtown areas can consist of drivers cruising for underpriced on‑street parking. This figure comes from specific case studies mostly in U.S. city centers and has been widely repeated in policy discussions, including in Switzerland, but is not based on a systematic national measurement of Swiss urban traffic.

Parking Zürich manages several parking garages in the city and provides real-time parking guidance to help drivers find available spaces nearby. The site is about parking availability and guidance, but it does not claim that 30% of urban traffic is search traffic.

The site offers parking products, park-and-stay options, and advance booking for parking in Lucerne. It is relevant to parking access and management, but it does not mention any percentage of urban traffic made up by drivers searching for parking.

The page advertises parking search and reservation services, including outdoor, covered, indoor, video-monitored, and 24/7 parking. It is a consumer parking service page and does not provide evidence for the 30% urban-traffic claim.