APT-E

London St Pancras to Leicester

Speed Restriction Boards

Speed restriction boards for APT-E's high speed runs between London and Leicester.


WARNING BOARD	COMMENCEMENT BOARD	TERMINATION BOARD

Boards are 2ft square with 18in letters.
Top of board approximately 6ft above rail level.

Board Location

Code Letter	Commencement (miles/chains)	Termination (miles/chains)	Speed restriction (mph)
A	11/20	12/60	110
B	18/14	19/31	115
C	19/31	20/72	105
D	24/70	27/34	120
G	27/70	29/16	100
H	29/60	30/40	105
I	34/54	35/30	No restriction
J	42/11	43/20	110
K	47/65	50/00	100
L	54/00	55/38	110
M	57/70	58/11	115
N	63/00	64/35	95
P	64/35	65/20	70
Q	69/74	70/58	110
R	70/58	72/60	100
S	74/55	75/60	110
U	78/00	78/20	115
V	82/00	82/40	85
X	82/40	83/40	75
Y	88/70	90/09	No restriction
Z	91/70	92/48	No restriction
a	94/12	95/46	110
b	95/46	95/74	95

Note: Letters O, T and W omitted; original restrictions E and F combined with D.

Track Curve Information

Curve No	Location (Mileage)	Cant (mm)	Curvature (m)	Hand of Curve
1	18.50 to 19.25	76.2	1460	L
2	19.30 to 20.27	87.0	1270	R
3	20.34 to 20.90	63.5	1440	L
4	24.80 to 25.40	105.6	1536	R
5	25.42 to 26.28	102.9	1440	L
6	26.31 to 26.86	105.0	1440	R
7	26.86 to 27.40	95.3	1440	L
8	28.03 to 28.47	88.9	1140	R
9	28.47 to 28.96	101.6	940	L
10	29.73 to 30.20	112.9	1140	L
11	34.58 to 35.47	127.0	1560	R
12	57.81 to 58.18	88.3	1513	R
13	74.83 to 75.79	60.1	1571	L
14	78.08 to 78.71	122.0	1357	R
15	89.10 to 90.22	77.2	1924	R
16	91.86 to 92.54	141.7	1297	L
17	95.58 to 95.92	151.2	666	R

London - Leicester (58½ minutes) 30 October 1975

Distance	Restriction	Elapsed Time (m s)	Speed (mph)
0.0	St Pancras	0 00	0.0
1.0		2 40	61.7
2.0		3 25	67.6
3.0		4 05	75.8
4.0		5 00	73.0
5.0		5 50	75.3
6.0		6 35	77.1
7.0	Hendon	7 20	77.7
8.0		8 05	90.4
9.0		8 45	99.2
10.0		9 20	105.8
11.0		9 50	111.1
11.3	A	10 00	111.2
12.0		10 35	110.8
13.0		11 00	115.9
14.0		11 25	124.5
15.0		11 55	126.2
16.0		12 25	125.4
17.0		12 55	125.9
18.0		13 25	117.4
18.2	B	13 30	114.6
19.0		13 55	106.0
19.4	C	14 10	107.0
19.9	St Albans	-	-
20.0		14 30	107.7
21.0		-	108.8
22.0		15 35	115.2
23.0		16 05	120.7
24.0		16 35	126.3
24.9	D	17 00	120.1
25.0		17 05	118.1
26.0		17 35	122.4
27.0		18 05	120.7
27.9	G	18 30	100.0
28.0		18 35	96.8
29.0		19 10	101.4
29.8	H	19 40	106.9
30.0		19 50	105.6
30.2	Luton	-	-
31.0		20 20	110.3
32.0		20 55	115.7
33.0		-	121.5
34.0		21 55	126.0
34.7	I	22 10	129.7
35.0		-	131.6
36.0		22 50	136.7
37.0		23 15	123.0
38.0		23 45	125.1
39.0		24 10	126.5
40.0		24 40	125.5
41.0		25 10	126.1
42.0		25 40	116.2
42.1	J	25 45	112.9
43.0		26 10	114.2
44.0		26 45	115.3
45.0		27 10	124.7
46.0		27 40	127.0
47.0		28 10	126.8
47.8	K	-	106.5
48.0		28 40	102.0
49.0		29 15	102.9
50.0	Bedford North	29 50	103.2
51.0		30 25	109.3
52.0		30 55	115.6
53.0		31 30	117.9
54.0	L	-	112.2
55.0		-	112.3
56.0		33 00	116.1
56.6	Sharnbrook Summit	-	-
57.0		-	116.6
57.9	M	34 00	117.0
58.0		-	116.5
59.0		34 35	117.7
60.0		35 05	121.6
61.0		35 35	125.8
62.0		36 00	126.5
63.0	N	-	101.6
64.0		37 10	88.6
64.4	P	-	72.9
65.0		-	71.8
65.1	Wellingborough	-	-
66.0		38 45	88.8
67.0		-	102.1
68.0		-	110.0
69.0		40 30	116.9
69.9	Q	-	112.4
70.0		41 00	111.5
70.7	R	-	103.5
71.0		41 30	102.4
72.0	Kettering	42 10	104.1
73.0		42 40	108.2
74.0		43 15	111.8
74.7	S	43 35	113.0
75.0		43 45	114.5
76.0		44 20	-
77.0		44 50	115.0
78.0	U	45 20	112.0
78.5	Desborough Summit	-	-
79.0		45 55	116.0
80.0		46 25	113.4
81.0		46 55	110.0
82.0	V	47 35	90.1
82.5	X	47 55	79.6
82.9	Market Harborough	-	-
83.0		48 15	77.1
84.0		49 00	91.0
85.0		49 40	105.7
86.0		50 10	112.4
87.0		50 45	115.4
88.0		51 15	117.0
88.9	Y	-	117.2
89.0		51 45	117.6
90.0		52 20	121.7
91.0		52 45	126.7
91.9	Z	-	124.4
92.0		53 15	124.8
93.0		53 45	126.4
94.0		54 10	123.0
94.2	a	-	114.4
95.0		54 45	99.1
95.6	b	-	97.3
95.9	Wigston North	-	-
96.0		55 20	98.5
97.0		56 00	96.3
98.0		56 40	73.6
99.0		58 05	19.1
99.1	Leicester	58 30	0.0

58m : 30s

Details of the London - Leicester high speed trials can be found in chapter six of 'APT A Promise Unfulfilled' by Hugh Williams.