Problems are reported for cyclists riding in bus lanes in central Edinburgh, such as Princes Street and Lothian Road. A number of cyclists have been killed in Edinburgh in recent years; in September 2004, a 28-year-old man was killed at the junction of Marchmont Road and Melville Drive. In April 2008, an award-winning neuroscientist who worked at the University of Edinburgh, Dr Iain Wilson, was killed in a collision with a truck on the junction between West Richmond Street and Nicolson Street. Disputes Pedicabs are a common form of transport for weekend revellers, with the number operating in Edinburgh growing from only 2 in 2000 to 60 by 2008. This has led to a growing number of complaints from taxi cab drivers, who resent the competition. In one dispute, a pedicab cyclist was reported to have been attacked by a group of three taxi drivers, who kicked and headbutted him. In other cases, taxi drivers have thrown cigarette butts at pedicab cyclists, and in one case, threatened a cyclist with a Taser stun gun (possession of such a device is illegal in Scotland). Cycling in certain public parks, like walkways across the Meadows, has been legal since the passage of the Land Reform Act in 2003, although signage was not corrected until 2011 in some cases. Portobello promenade has likewise been officially acknowledged as a legal cycle route. Concerns have been expressed that cyclists may run pedestrians over. Peng Lee Yap, chairman of Friends of the Meadows, said "While this is clearly a difficult issue, it was felt that the positive way forward is the approach of Spokes to improve cyclists' behaviour." In late 2007 Spokes Lothian group launched their "Bike Polite" campaign to encourage cyclists to be more considerate. Waterways The Union Canal was opened in 1822 and provides an inland waterway link from Edinburgh to Falkirk and from there to Glasgow via the Forth and Clyde Canal. It is currently owned by the public corporation Scottish Canals and chiefly used for leisure purposes. Pedestrians Given that Edinburgh is a small, relatively walkable city, travelling by foot is a common means of transport for the majority of citizens who live, work or visit the city. Like most urban zones, pedestrian density is at its highest in the commercial core of the city, where the majority of shops, businesses and offices are located, with pedestrian density tailing off rapidly through