TfL says it is working to ensure anti-terrorism barriers on London bridges affect cyclists as little as possible

Ride on the pavement.

clearly, they don't give a shit about people on bikes

the terrorists have won on this front

TfL said: “The Met has installed barriers to increase security on London’s busiest bridges. We are working with them to ensure that these barriers affect cyclists as little as possible...”

Translation: We don't care about cyclists and we don't care if and how this affects them. It was just a box-ticking exercise anyway, so stop asking questions.

Assuming a better fix than this hopefully temporary solution can be found, one that really protects all vulnerable road users, it would be quite amazing if it could be implemented not only here but also on all other useful and busy cycling routes that might potentially present terrorist targets.

When you think about it where is the sense of protecting one group of road users from one particular kind of threat if the constant danger to all continues to be ignored.

The problem these barriers deal with can be easily solved: A big company launches a new product LifeCamo which is a spray that you spray all over yourself. Matte black for nightime, light blue for sunshine and gray for cloudy weather. You make an advertisement with a darkish guy with packs at his belt and a balaclava in the middle of an empty Trafalgar Square wondering where all his potential victims are, when a better zoom reveals that they are passing by, practically invisible thanks to LifeCamo. The world can sleep safe now...

For me, if the motorised vehicles are the problem, it should be the space devoted for them that is taken away.

Trust kerbs are all well and good but need to installed in the carriageway.  They may be a viable option in the long term but not if a barrier is needed immediatley

Security Theatre at its finest, all the whilst ignoring every single bit of how not to react to a threat.

The idiots  that thought this was a good idea should be strung up, but then again they are probably the same types who design most of the so called cycling infra in this country.

The hate speech thrown at people commenting about how they have being endangered by these things is disgusting and just shows you the level of hate for people on bikes by joe public and that it is just behind that of those that did the deed.

Even sadder is that people on bikes are attacked by terrorists every single day, every third day a cyclist dies, the vast majority from criminal activity and many are seriously injured every day due to terrorism and hate.

One way bridges for traffic, chunky cycle lanes either side, nicely protected along with those on foot.

Oh, and build another bridge east of Tower and that proposed bicycle/pedestrian one at Battersea. 

White van men and truckers running cyclists over every few weeks: glacial improvement in cycling infrastructure measured in years

Muslim nutters start running over pedestrians: concrete barriers up the next day

I don't want to sound flippant considering the nature of the tragedy but it shows that you can make a decent start without spending years and years and hundreds of millions of pounds. 

Now is the ideal time for TfL work with the Met Police to get barriers outside the cycle lane (with bollard to stop cars getting inside them) on all London bridges and then make them permanent.

In as much as I appreciate the need (sad as it is) for this kind of security now, the way it's been thrown together from any old shit just beggers belief. London Bridge never had a Cycle Lane (despite being three lanes wide - what's that about?) so cycles shared the Bus Lane. Fine.

Now however, the barrier is so wide that the Bus Lane is essentially 'a really big cycle lane' but buses now straddle between that and the centre lane. Genius.

It's worse if you're a pedestrian - They've put them massive metal / concrete bollard things on both ends of the bridge, but rather than use only enough to stop a vehicle they've used so many that instead of about 4m width pavement, there's now only three half-metre wide sections - so huge bottlenecks there. Fab.

And it's actually still possible to get onto the ends of the bridge in a vehicle anyway if you're that determined (which these scumbags are) so overall a monumental waste of time and effort all round.

Quote:

"We are working with them to ensure that these barriers affect cyclists as little as possible, while ensuring the security of all road users."

So, that sounds like it involves taking a quick glance at the barriers and saying "yeah, that's the best we can do" even though it clearly isn't.

As others have pointed out, the design of Southark Bridge's cycle lanes would work with minimal modification: https://goo.gl/maps/FXAoYdaQZmS2 all you need is a couple of Westminster bollards at each end on each side - one on the end of the cycle lane segregation kerb, another about 15 cm from the edge of the pavement. You might have to extend the segregation kerbs far enough to be off the bridge to get sufficient foundation depth, but that's a good thing.

These containment kerbs work: https://youtu.be/G-B-_urqTkk

Job done - pedestrians and cyclists protected from rampaging vehicle drivers and provide proper segregation for cyclists from just your regular idiots too.