Tom Anderson wrote:

Evening all,

Firstly, what, if any, effect has the charge had on safety? Are there
fewer road casualties in central London now? More? Have they been
displaced? Anyone know of any data?

Secondly, why is it being extended westward? Why not to the north, where i
live, so i can ride to work more easily? Is the west more congested, or
more in need of better bus services? Or does Ken just like people in the
west more? Or particularly hate western drivers?

I've worked out a Northern boundary:

A5 up to junction A5205 of St John's Wood Road

A5205 St John's Wood Road, across the A41 and remain on A5205 Prince
Albert Road
Left onto Parkway (which is either A503 or A4201, not sure which)
A503 Camden Road. In the opposite direction the border goes down Bayham
Street then right into Pratt Street which becomes Delancey Street

A1 Holloway Road (East) up to Highbury Corner
A1199 St Pauls Road leading to A104 Balls Pond Road then A1207 Graham
Road
A107 Mare Street South until border with A106
then A106 in both directions (it's a split one-way street) up to first
junction with A12 then A12 Southbound beyond that. Could go through
Blackwall Tunnel or could simply go along A13 or A1261 etc. If
Blackwall Tunnel then A2 is boundary on the other side.

Where the border is made up of two one-way streets (as with A106) then
the roads between them are outside the zone.