So we all know about Rule 233 and we all know we are supposed to use the slip to merge sucessfully into the traffic already on the motorway without disrupting the flows. We all know that entering and exiting the motorways are the tricky bits and that we should be COASTing our way on and off in any case.
However, there are some slip roads from hell and we have discussed in the past. as in J34/M6 and various others (M1/A14 and various on M62/M1/M25 etc.
e-mail to me from my one of my sisters wrote:
Two identical incidents.. Tootling down L1 .. steady 65 mph. Overtaken by traffic in L2. Two cars entering slip road and first one has space to enter.. the second one on each occasion nearly had my left nearside rear. Each seemed to speed up instead of easing off to match the flow into L1 in my opinion. No .. could not move into Lā ā traffic already there .. had to accelelerate to within one second behind the first car to join on each occasion.
These were close.. the first was as I passed the entry to M60 from the Trafford Centre and the second was at the merge from the M602 - always nasty as it's so short and I really hate this slip as M60 joiner or someone already on M60. I always feel nervous on approach and it does not get any better with experience either.
So ā Ted ā explain to me in non- smarty pants-arse language just exactly what I did wrong there and where Highway Code 233 seems to go a bit awry here as short of emergency stopping I ended up being a tailgater for a split second to avoid a potential crunch.
Have already given my "smarty-pants-arse" reply to Julie on the phone!
But decided that perhaps others might offer my sister some gentler advice as she does lurk on the site
So since entering and exiting seem to be the areas where collisions seem to occur (based on traffic congestion reports on radio) - what would you do if
1, you cannot safely move to L2 to allow someone to enter the motorway
2. you are already approaching the entrance slip at a sedate but reasonable speed for a motorway
3. Several cars on slip road
4. You have car closing in on rear.
This was the situation my sister had to deal with and I think - in reality - she did right to speed up to close in to one second distance short term on the first car to give the space margin to the second car under this circumstance.. but let's here what others think as I am perhaps biased to my young sister here.

She's not a type who gets all hot and bothered about much .. she reckons she did the right thing as "no metal changed shape"
But she feels she was too close - closer than she liked to be even for a split second - like us all - she likes to keep a decent distance all the time. But perhaps sometimes needs must and she says she was closer than she liked for an "blink of eye" time - and then able to ease back.