The campaigners secured the support of more than half the total number of MEPs for the written declaration, meaning the European Commission (EC) was required to come forward with measures to change the law in line with their wishes.
In September, The Journal reported that the EC had delayed its report on the matter until before Christmas or the end of the year.
At the time, Mrs Hall accused the commission of dragging its heels on road safety, a suggestion it denied.
Liberal Democrat Mrs Hall recently wrote to the commission asking it to speed up publication of its response.
The commission’s vice president Siim Kallas has now written back stating that the report “will only be finalised in the coming days” and therefore “be delayed by a few months”.
Last night, the added delay prompted Mrs Hall and Kate to question how many more cyclists would be killed while politicians ponder.
Mrs Hall said: “The delay is very disappointing. We had initially hoped for a response after the summer break, and that was pushed back to Christmas time.
“Now we will have to wait until the spring at least. While I appreciate the commission’s desire to evaluate all the available data, I would have hoped for them to have done so by now.
“The sooner we can get cameras and sensors in HGVs, the sooner we can cut the number of deaths and injuries they cause.”
Kate said: “We went there in February so it is going to be a year.
“The longer they do nothing, the more people die.
“It is very disappointing that the commission have not come back with anything yet.”