Cambridge data:

• Population growth
• House prices
• Household income
• August riots
• Vote share
• City Council employees
• Local newspaper circulation

Workflow:

• City Council data
• County Council data
• Office for National Statistics
• Guardian Datablog
• WhatDoTheyKnow
• Excel :-)
• Paint.Net
• svg-edit
• WordPress
• Twitter
• Facebook

Cool stuff:

• FlowingData
• Visualise This
• ScraperWiki
• d3
• plot.io

Thanks to everyone who came to the talk!

One of the most controversial questions the survey asked was about “chip and bin”:

In order to implement a reward scheme it might be necessary for the bins to have microchips. The microchip would identify your bin so that points could be awarded based on the amount you recycle. Would you be interested in taking part in such a scheme?

The general response was pretty negative. Here are the results from the telephone survey:

The Other responses were mostly “Don’t know”, or people with communal bins saying it wouldn’t apply to them.

The picture from the on-line survey was much the same:

Although there were fewer negatives than in the telephone survey, there were also fewer people saying it would encourage them to recycle more – just 10.7%.

The survey also gives figures by dwelling type and household size. People living in different dwelling types were all more or less equally opposed:

The larger Other figure for flats mainly represents people with communal bins.

People living in households of one or two people were more opposed than larger households:

Particularly in the context of a reward scheme, this is a pretty solid thumbs down. It looks like Cambridge City Council will have an uphill struggle to get local residents to accept microchips in their bins.

The Lib Dems dutifully report their membership every year, and it has risen by about 30% since 2001, with a noticeable boost in General Election years (2005 and 2010).

Labour has only included a couple of membership figures in their reports, 632 for 2005 and 797 in 2010, a 26% rise over five years. 2005 was of course the year that Labour’s Anne Campbell lost the Cambridge parliamentary seat to David Howarth, with the Iraq War a major issue.

The Cambridge Conservative party hasn’t made any reports to the Electoral Commission, presumably because its turnover doesn’t reached the required threshold of £25,000, and I haven’t found any membership figures for them. Would any of my Conservative readers care to comment?

The Greens made their first report in 2010, as their vigorous General Election campaign sent their annual spending in Cambridge to £44,783. Their report gave their total membership in Cambridge as 114, up from 96 the previous year.

Of course, all these numbers are pretty small compared to the overall size of the Cambridge electorate, which is 75,259 for Parliamentary elections. It’s also interesting to compare them with the membership of the Cambridge Cycling Campaign (over 1,100), and Cambridge Past Present & Future (over 1,700), though both these organisations cover a wider area than the Cambridge Parliamentary consituency.

The Electoral Commission reports also include a lot of information about donations to and spending by local parties, and I’ll be looking at this in a future post.

It’ll be interesting to see what measurable difference to the A14 this money will actually make. Julian Huppert has said he will find out exactly what is planned. The Autumn Statement also announced £110 million for widening the A14 Kettering bypass in Northamptonshire.

In Cambridge, the  Liberal Democrats are currently distributing a survey about 20 mph speed limits to selected households. Although presented as a questionnaire, the accompanying leaflet and letter from Julian Huppert argue strongly for a blanket 20 mph limit, and some of the questions seem designed to get the answers that the Lib Dems want to hear. Question 4, for example, reads “Do you think we should have a 20mph limit for all roads in the city, or just in residential areas?” We should be cautious about any claims the Lib Dems make about Cambridge opinion on the basis of this survey. I hope they will publish the data they collect, so it can be analysed independently.

Anyway, what has Portsmouth’s experience been with 20 mph limits? The Portsmouth speed limits were introduced in 2007-08, at a cost of about £570,000, and cover 94% of Portsmouth’s road network. The Department for Transport published a detailed report last year on the results so far. Here are some highlights from it:

Firstly, what difference has it made to traffic speeds? Well, not a huge amount. Across the city, average speeds are 1.3 mph slower than they were before.

This is similar to Cambridge’s experience with our own more limited 20mph zones, which on the whole have made little difference to traffic speeds. It’s worth noting that, unlike Cambridge, average traffic speeds in Portsmouth were already mostly below 20 mph before the reduced limit was introduced.

Secondly, has it made the roads safer? Well, yes and no. Here are the figures for the number of people killed or seriously injured before and after the change:

As you can see, the number of people killed or seriously injured actually went up after the change. This was entirely due to more pedestrian casualties – there were 8.7 per year after the change, compared to 6.3 before, a rise of 38%. However, the numbers involved are very small, so random fluctuation may have played a significant role. The story was better for slight injuries:

Here the figures fell by 18.6%, with all categories of road user seeing improvements. However, it’s worth noting that traffic accident figures have also been falling elsewhere in recent years, so it’s debatable how much of this drop was due to the speed limit change.

Thirdly, and of particular interest to politicians, do people like the change? On the whole, they do. Here are the satisfaction figures from a survey of around 1,400 Portsmouth residents:

Unfortunately the report doesn’t give the raw figures, so I’ve just taken the graph directly (recolouring it for clarity). Also, although the survey asked people whether they were “fairly” or “very” satisfied or dissatisfied with the change, the report doesn’t give these figures either. So it’s possible that there are stronger opinions at one end of the spectrum than the other. But the overall picture is clearly that more people favour the change than oppose it.

Like Cambridge, Portsmouth has a Lib Dem majority on its City Council. It’s likely that the 20mph debate will be a feature of Cambridge local politics for some time to come. Let’s hope it will be influenced by the data.

Some figures published in the Guardian datablog today give the picture. Cambridge currently recycles 44% of its household waste, slightly ahead of the UK average of 41.2%. However, you could argue that the important thing is not the percentage of waste recycled, but rather the total amount of waste that isn’t recycled. On the whole, reducing the amount of waste produced is better than producing lots of waste and recycling some of it. Fortunately, the figures cover this too, so we can see how the two numbers relate. Here’s the data for each local authority in England:

In the top left corner we have Surrey Heath, recycling 65% of their waste, with just 281 kg/household not recycled each year. In the bottom right corner, in fact some way off the edge of the chart, are the Isles of Scilly, recycling just 19% of their waste, with a massive 1,425 kg/household not recycled. Cambridge is slightly better than middling.

As well as benefitting the environment, councils have a strong financial incentive to increase recycling, in the form of landfill tax. This currently costs them £48 per tonne sent to landfill, and it is set to increase by £8 per tonne each year for at least the next several years. Cambridge City Council is currently running a consultation about its bin collection service, which closes on Monday, with a view to increasing the efficiency of the service. Among other things this consultation is asking  whether people are prepared to accept microchips in their bins to monitor the amount of waste. It’ll be interesting to see what responses the consultation gets.

£9,450 went to pay for the actual fireworks, slightly exceeded by the £9,634.80 spent on hiring sound equipment. £6,220 went on hiring a traffic management system, and £4,036.10 on security services – these were provided by three different security firms, BDI Securities, Show & Event Security and Spartan Rescue Ltd. You have to wonder why three different firms were involved. There was also £1,400 for catering – it would be interesting to know more about this, too. Portable toilets cost £1,585. St John Ambulance received £1,000 (not paid until the following April), Cambridgeshire Police got £481.85, and £598 went to Student Community Action for stewarding.

The total amount spent was £38,181.85. The city council did manage to collect £22,000 in sponsorship, plus whatever they collected from the crowd on the night.

There’s a huge amount of information in the Payments to Suppliers data, which will help to make all sorts of Council activities more transparent. This can only be a good thing – and I’m sure there are many more interesting tidbits lurking in the files.

Schools receive a premium of £488 for each FSM pupil. The percentage of FSM pupils varies widely across the city:

The primary schools are quite evenly distributed; amongst the secondaries, The Manor is well ahead of the rest. Of course some schools have more pupils than others, so the total amount of pupil premium varies with school size as well. Here are the total cash amounts to be paid to each Cambridge state school for FSM pupils:

Netherhall comes out top, with more than twice as many pupils as The Manor, though some of the primaries also do quite well.

How does the pupil premium relate to the overall size of the budget for each school? The total budget figures are available, though in a hard-to-reuse PDF format. Here are the relative sizes of the total budget and the pupil premium for the five schools getting the most pupil premium money:

While I’m sure the extra money will be welcomed by the schools, it’s still a relatively small amount in the context of their total budget – though the pupil premium is due to rise in future years.

There’s a peak at 20-24, a plateau from 25-44, and the figures tail off after that – perhaps people are better at finding jobs as they get older, or possibly they move on to other benefits.

We can also look at whereabouts claimants live in the city:

Kings Hedges, Arbury, Abbey and East Chesterton have the largest number of claimants, and the student wards, Castle, Market and Newnham have the fewest. It’s also noticeable that most JSA claimants are men – they account for 68% of claimants overall.

Here’s how the claimant data looks on a map:

The map colouring here shows the percentage of the working-age population claiming JSA, ranging from 0.4% in Newnham to 4.5% in King’s Hedges.

These figures are all from September 2011. There’s a great deal more data on the Nomis website, including a lot of historical information – enough to keep a data geek busy for a long time.

Judging by my referrer logs, there’s quite a lot of interest in the campaign against the proposed 25% increase in Cambridgeshire County Councillors allowances, so here’s an update on how the petition is doing. After my earlier article, councillor Belinda Brooks-Gordon tweeted that it was a bit premature to describe the number of signatures as tailing off last Tuesday, and it seems that she had a point. Here’s the state of play at the end of Saturday 29 October, when the petition had 1,067 on-line signatures.

I’ve also done a bit more analysis of the geographical distribution of signatures. The County Council’s system gives the district council ward for each signature, so we can look at which districts have most petitioners. Here’s the leader board at the end of Saturday:

Cambridge City and South Cambs are both well represented, with Huntingdonshire also breaking in to the top ten and East Cambs some way behind. There have been very few signatures from Fenland, with its top ward being March West, down in joint 52nd place with just 6 signatures. Here’s a graph of the signatures from each district for each day of the petition so far:

This shows that signatures from Cambridge and South Cambs have indeed been tailing off during the week, with Huntingdonshire growing from a small base to take the lead in the second half of last week. Meanwhile East Cambs and Fenland have mostly remained quieter. Will there be a stronger showing from these districts next week?

The Lib Dems have also been busily gathering signatures on paper, so it remains to be seen what the eventual total for the petition will be. It’s already well ahead of any other petition on the County Council’s system, though it has a long way to go to match the total of 10,389 signatures reached by the petition against the City Council’s proposal to relocate the Lion Yard public toilets. There are four weeks to go until the allowances petition closes.