You need an identity as an organisation. Having a name, logo and slogan to hide behind is what gives your group its legitimacy. Individuals and members become spokespeople, press officers, campaigners, which are all terms that decision-makers can identify with.
Your identity is what draws new people into your group. There are two schools of thought about acronyms - some groups believe that a clever acronym makes your group more memorable, others think that it belittles the campaign message. It is up to your group to decide, but remember that your identity defines how others (either cyclists or motorists, pedestrians, councillors, etc.) will view you.
Choose a simple name that clearly expresses your intentions. If you get stuck, then you might try calling yourself your local cycle campaign, as Warrington Cycle Campaign and the LCC (London Cycle Campaign) have done.
A logo can help the public identify and remember your group. Keep it simple, and make sure that it looks okay when reduced for A5 leaflets. A good example is Cambridge Cycling Campaign or Chicycle a cycling campaigns group affiliated to CTC based in Chichester.
Headed paper for letters and press releases give your group a real credibility. It can be made cheaply by inserting your logo into the top right-hand corner of a new document, then saving it as a template.
It may also be useful to set up an email address with the name of your campaigns group, it looks very professional, an example is Readingcyclingcampaign@hotmail/yahoo/etc.
You can direct the mail this account receives to either yourself of a group of people, so the messages are picked up promptly. A standard group email-signature would also be a good way to standardise and professionalise the appearance of the campaign group; it will also save individuals having to set up their own.