There are starting to be some great resources out there on skateboarding as transportation, and there is a wealth of interesting stuff online about skate skills and skate culture that also help make a strong case for transportation.
TEDx San Diego last year hosted a great talk How Context Shapes Content from street skate legend Rodney Mullen, exploring the the collaborative aspects of street skate stunts and the connection between skaters and their environments.
Northwest Skate Coalition is based in Portland Oregon, and works to maintain and create fun, safe and legal environments for every type of skateboarder.
Parents for Skateparks in Seattle has worked with the City to install skatable terrain “skate dots” in city parks.
Skaters for Public Skate Parks is a non-profit skatepark advocacy organization dedicated to providing the information necessary to ensure safe, rewarding, freely-accessible skateparks are available to all skateboarders.
Skate Friendly Portland is a City initiative to distribute Portland’s skateboarding regulations.
PDXdownhill is a resource for the downhill scene in Portland Oregon.
Skate Like a Girl works in Seattle, Portland, and San Francisco to promote female skateboarding by fostering confidence in girls and women to skateboard and take leadership in their communities.
Some of the more useful academic journal articles and mainstream media pieces that I’ve dug up:
Babey, Susan H, Theresa a Hastert, Winnie Huang, and E Richard Brown. “Sociodemographic, Family, and Environmental Factors Associated with Active Commuting to School Among US Adolescents.” Journal of Public Health Policy 30 Suppl 1, no. 5 (January 2009): S203–20. http://www.ncbi.nlm.nih.gov/pubmed/19190574.
Bachman, Rachel. “Utility and Thrills Put Longboarding on the Rise in Portland.” Oregonian 2 June 2010.
Becky Beal. “Alternative Masculinity and Its Effects on Gender Relations in the Subculture of Skateboarding.” Journal of Sport Behavior 3, no. 1996 (2010): 1–11.
Bonham, Jennifer, and Barbara Koth. “Universities and the Cycling Culture.” Transportation Research Part D: Transport and Environment 15, no. 2 (March 2010): 94–102. http://linkinghub.elsevier.com/retrieve/pii/S136192090900114X.
Borden, Ian. Skateboarding, Space and the City: Architecture and the Body. Berg
Publishers/Oxford University Press, 2001.
Dill, Jennifer, and N McNeil. “Four Types of Cyclists? Examining a Typology to Better Understand Bicycling Behavior and Potential.” Transportation Research Board 92nd Annual Meeting (2013). http://docs.trb.org/prp/13-5213.pdf.
Dill, Jennifer and Kim Voros. “Factors Affecting Bicycling Demand: Initial Survey Findings from the Portland, Oregon, Region.” Transportation Research Record: Journal of the Transportation Research Board. No. 2031 (2007)
Dougherty, C. “Skateboarding Capital of the World.” The Wall Street Journal (2009): 12–15. Print.
Fang, Kevin. “Skateboarding as a Mode of Transportation: Review of Regulations in California Cities and College Campuses.” Transportation Research Board 92nd Annual Meeting 2013. http://trid.trb.org/view.aspx?id=1242068.
Hunter, Jamie. “The Epidemiology of Injury in Skateboarding” Epidemiology of Injury in Adventure and Extreme Sports, Heggie, T.W. and D.J. Caine, eds. Karger, Basel (2012).
Inoue, Nobu, Ruth Baker, and Debbie Scott. “Injury Bulletin: Skateboard Injury.” Queensland Injury Surveillance Unit no. 105 (2009).
Karsten, Lia, and Eva Pel. “Skateboarders Exploring Urban Public Space: Ollies, Obstacles and Conflicts.” Journal of Housing and the Built Environment 15 (2001): 327–340.
Lees, Loretta. “The Ambivalence of Diversity and the Politics of Urban Renaissance: The Case of Youth in Downtown Portland, Maine.” International Journal of Urban and Regional Research 27, no. September (2003). http://onlinelibrary.wiley.com/doi/10.1111/1468-2427.00469/abstract.
Lefebvre, Henri. “The right to the city.” Writings on Cities (1996): 63-181.
Lloyd, Barbara. “Archives For Skateboard Fans, A New Way to Travel.” New York Times. New York, 1992. http://www.nytimes.com/1992/02/22/news/for-skateboard-fans-a-new-way-to-travel.html?pagewanted=print&src=pm Page.
Love Park: Saga of a Skate Landmark. On Video Magazine winter 2004. Since closed, available archived http://www.skatevideosite.com/skatevideos/on-video-winter-2004/soundtrack Video.
Németh, Jeremy. “Conflict, Exclusion, Relocation: Skateboarding and Public Space.” Journal of Urban Design 11, no. 3 (October 2006): 297–318. http://www.tandfonline.com/doi/abs/10.1080/13574800600888343.
Nolan, Nicholas. “The Ins and Outs of Skateboarding and Transgression in Public Space in Newcastle, Australia.” Australian Geographer 34, no. 3 (November 2003): 311–327. http://www.tandfonline.com/doi/abs/10.1080/0004918032000152401.
Ostendorf, Jon, and Joel Burgess. “Skateboarders Aim to Flip Commuter Bans”. USA Today, (1 April 2011:) http://usatoday30.usatoday.com/news/nation/2011-01-04-skateboards04_ST_N.htm
Parents for Skateparks. What is a Skate Dot? http://www.parents4sk8parks.org/pdf/SalmonBay2011.pdf
Pomerantz, Shauna, Dawn H. Currie, and Deirdre M. Kelly. “Sk8er Girls: Skateboarders, Girlhood and Feminism in Motion.” Women’s Studies International Forum 27, no. 5–6 (November 2004): 547–557. http://linkinghub.elsevier.com/retrieve/pii/S0277539504000536.
Rogers, Peter, and Jon Coaffee. “Moral Panics and Urban Renaissance.” City 9, no. 3 (December 2005): 321–340. http://www.tandfonline.com/doi/abs/10.1080/13604810500392613.
Rosenberg, Dori E, James F Sallis, Terry L Conway, Kelli L Cain, and Thomas L McKenzie. “Active Transportation to School over 2 Years in Relation to Weight Status and Physical Activity.” Obesity (Silver Spring, Md.) 14, no. 10 (October 2006): 1771–6. http://www.ncbi.nlm.nih.gov/pubmed/17062807.
Sabo, Donald, and Joe Panepinto. “Football ritual and the social reproduction of masculinity.” Sport, Men, and the Gender Order: Critical feminist perspectives (1990): 115-126.
Schieber, Richard A., Christine M. Branche-Dorsey, and George W. Ryan. “Comparison of in-line skating injuries with rollerskating and skateboarding injuries.” Journal of the American Medical Association 271.23 (1994): 1856-1858.
Smith, R. G. “Skateboard injuries.” Canadian Medical Association Journal 121.5 (1979): 510.
Steyn, Daniel. “The Body in Public Culture: Skateboarder.” PostAmble 1, no. 1 (2004): 12–18.
Stinson, Monique, and Chandra Bhat. “Frequency of Bicycle Commuting: Internet-Based Survey Analysis.” Transportation Research Record 1878, no. 1 (January 1, 2004): 122–130. http://trb.metapress.com/openurl.asp?genre=article&id=doi:10.3141/1878-15.
Stratford, E, and A Harwood. “Feral Travel and the Transport Field: Some Observations on the Politics of Regulating Skating in Tasmania.” Urban Policy and Research (2001). http://www.tandfonline.com/doi/abs/10.1080/08111140108727863.
Stratford, Elaine. “On the Edge: A Tale of Skaters and Urban Governance.” Social & Cultural Geography 3, no. 2 (January 2002): 193–206. http://www.tandfonline.com/doi/abs/10.1080/14649360220133943.
Tominaga, GT, KB Schaffer, IS Dandan, and JF Kraus. “Epidemiological and Clinical Features of an Older High-risk Population of Skateboarders.” Injury (2012). http://www.sciencedirect.com/science/article/pii/S0020138312000423.
Vivoni, F. “Spots of Spatial Desire: Skateparks, Skateplazas, and Urban Politics.” Journal of Sport & Social Issues 33, no. 2 (March 23, 2009): 130–149. http://jss.sagepub.com/cgi/doi/10.1177/0193723509332580.
Woolley, Helen, and Ralph Johns. “Skateboarding: The City as a Playground.” Journal of Urban Design 6, no. 2 (2001): 211–231.