Need help

Samd22 · Post by **Samd22** » Thu Mar 30, 2006 10:02 pm

A German friend of mine wants to know which lines in the UK have a speed of higher then 160km/h....I have a rough idea but was wondering if anyone knows for sure?

Matloughe · Post by **Matloughe** » Thu Mar 30, 2006 10:19 pm

whats that in MPH? lol,

125mph?

AlanP46 · Post by **AlanP46** » Thu Mar 30, 2006 10:22 pm

100MPH

1.6km to every mile.

Alan

mattvince · Post by **mattvince** » Thu Mar 30, 2006 10:50 pm

Great Western Main Line - Ladbroke Grove to Corsham/Bristol Parkway, Long Ashton (Bristol)-Taunton. Maximum Permissive Speeds between 110 and 125mph, some HST differentials. London-Reading and Didcot-Corsham/Bristol Parkway Automatic Train Protection applies for operation above 100mph. Some permanent speed restrictions. Class 22x permitted to run at 125mph between Reading and Didcot.
Berks & Hants (Reading-Taunton via Newbury) - speeds up to 115mph with HST differentials, no ATP fitted.
West Coast Main Line - Camden to Glasgow (exclusive) via Crewe - speeds up to 110mph, 125mph Enhanced Permissable Speed (tilt), some permanent speed restrictions. Colwich Jn-Cheadle Hulme up to 125mph EPS (not sure of normal line speed). Wolverhampton-Stafford HST 125mph (diesel only, else 90mph). Crewe-Manchester via Wilmslow - maximum of 110mph.
Midland Main Line - St Pancras to Trent South Junction - line speeds up to 110mph with many permanent speed restrictions. Derby to Sheffield - some sections of 110mph.
East Coast - Finsbury Park to Darlington - line speeds up to 125mph, with HST differentials, some Permanent Speed Restrictions. Some sections north of Darlington are over 100mph, not sure though.
Cross Country - Didcot to Leamington - line speeds up to HST 110mph, Tilt enabled IIRC.
Birmingham to Derby - HST 125mph, 90mph normal, but Class 170s permitted to run at 100mph.
CTRL - Southfleet Jn to Westenhanger - 300km/h linespeed with TVM430 except through Ashford where 270km/h limit exists.
Old Dalby Test Track - HST 125mph with Tilt available.

No others that I know of in England and Wales.

AlistairW · Post by **AlistairW** » Fri Mar 31, 2006 1:24 am

What makes something a permanent speed restriction as opposed to the recommended line speed?

Samd22 · Post by **Samd22** » Fri Mar 31, 2006 4:59 pm

mattvince wrote:Great Western Main Line - Ladbroke Grove to Corsham/Bristol Parkway, Long Ashton (Bristol)-Taunton. Maximum Permissive Speeds between 110 and 125mph, some HST differentials. London-Reading and Didcot-Corsham/Bristol Parkway Automatic Train Protection applies for operation above 100mph. Some permanent speed restrictions. Class 22x permitted to run at 125mph between Reading and Didcot.
Berks & Hants (Reading-Taunton via Newbury) - speeds up to 115mph with HST differentials, no ATP fitted.
West Coast Main Line - Camden to Glasgow (exclusive) via Crewe - speeds up to 110mph, 125mph Enhanced Permissable Speed (tilt), some permanent speed restrictions. Colwich Jn-Cheadle Hulme up to 125mph EPS (not sure of normal line speed). Wolverhampton-Stafford HST 125mph (diesel only, else 90mph). Crewe-Manchester via Wilmslow - maximum of 110mph.
Midland Main Line - St Pancras to Trent South Junction - line speeds up to 110mph with many permanent speed restrictions. Derby to Sheffield - some sections of 110mph.
East Coast - Finsbury Park to Darlington - line speeds up to 125mph, with HST differentials, some Permanent Speed Restrictions. Some sections north of Darlington are over 100mph, not sure though.
Cross Country - Didcot to Leamington - line speeds up to HST 110mph, Tilt enabled IIRC.
Birmingham to Derby - HST 125mph, 90mph normal, but Class 170s permitted to run at 100mph.
CTRL - Southfleet Jn to Westenhanger - 300km/h linespeed with TVM430 except through Ashford where 270km/h limit exists.
Old Dalby Test Track - HST 125mph with Tilt available.

No others that I know of in England and Wales.

Thanks Matt.

Keelar001 · Post by **Keelar001** » Fri Mar 31, 2006 5:04 pm

AlistairW wrote:What makes something a permanent speed restriction as opposed to the recommended line speed?

PSRs are usually imposed for tight bends, pointwork, structures and so forth - the restrictions through the reverse curves at Morpeth for example.

electric · Post by **electric** » Fri Mar 31, 2006 9:31 pm

AlistairW wrote:What makes something a permanent speed restriction as opposed to the recommended line speed?

As I understand it the Recommended speed is to maintain the passanger comforts, and a Permanant is the highest speed the track can be saftley navigated at. In most places I think there is only the PSR.

I'm probably wrong as this is a stab in the dark so i'm more than happy to be told I'm wrong (nicely)

allypally · Post by **allypally** » Sat Apr 01, 2006 8:51 am

Is not the recommended line speed the line was built at, and the PSR what years of poor maintainance/land slips etc have brought it down to, hence why PSRs tend to be islands in high speed limits?

mattvince · Post by **mattvince** » Sat Apr 01, 2006 10:19 am

Recommended Line Speed, AIUI, is the maximum speed permitted by the Engineer for a section of line. It depends on track geometry and signal sighting times, including signal spacing. If the geometry is too tight over a section (curves especially), then a PSR is applied.