Tom Harrison writes:

"Regarding the time frame for delivery. Of course I'm keen on getting it in place asap, but I'm reluctant to sacrifice quality for speed of implementation."

(http://www.cyclescape.org/threads/1231#message_13546)

Why the reluctance?

(1) Think in terms of a network
(2) Plan the network
(3) Study the feasibility of the network
(4) Introduce the network
(5) Develop the network further "on the basis of priority interventions and a timetable" (the key here is sustained investment).

Why would you not set about completing Step (4) as quickly as possible, establishing a solid foundation, and then building up from there?

Why would you not do that?