So as to help people keep track of various developments and transport
policies proposed (or the lack thereof):

The UK Independence Party are currently selecting their candidate for Mayor.
A shortlist of six will be voted on at the UKIP party conference this
autumn, with blocks of votes to be won in an open primary currently
underway.

http://www.indhome.com/londonmayor/

There are six cadidates:

David Coburn - Stood for Parliament in Old Bexley & Sidcup in 2010.

MIchael Corby - Joined UKIP last month, ex Conservative donor.

Michael McGough - Stood for the GLA City & East seat in 2008; also stood
variously for Parliament in Brentwood & Ongar in 2010 and the European
Parliament in the East of England in 2009.

Winston McKenzie - ran as an Independent in 2008, has been variously a
member of, and sometimes a candidate for, the Conservatives, Labour, Liberal
Democrats, UKIP and Veritas. He also briefly formed the "Unity Party" before
rejoining UKIP.

Paul Oakley - Joined UKIP a couple of months ago; former Conservative who
stood for Parliament in St Helens North in 2005. Former London chair of the
London Young Conservatives in the YCs' final years.

Lawrence Webb - Stood for Parliament in Hornchurch & Upminster in 2010.

In terms of transport policies the limited manifestos on the site don't
offer much but:

David Coburn - Scrap the congestion charge and drop support for EU
emmissions regulations.

Michael Corby - "Have a genuine consultation, and collectively decide what
to do".

Michael McGough - "get London moving, loosening parking, re-phasing traffic
lights and scrapping the low emission zone". Also talks about putting
Londoners first not Olympic ticket holders which may have transport policy
implications.

Winston McKenzie - None on the primary site. It links to his 2008 campaign
site.

Paul Oakley - None on the primary site; no link to anything else.

Lawrence Webb - The nearest to a transport policy listed is a desire to keep
the ice cream van on the roads.

Well I guess at least they're not making wild promises and insisting that
all that's needed to implement them is the right political will...