Talk:Philadelphia and Lancaster Turnpike

Mileposts
Turnpike starts as PA 462 Turnpike becomes US 30 Turnpike becomes US 30 BUS. Turnpike becomes US 30 Turnpike becomes Lancaster Ave.
 * 0.00     PA 441
 * 7.73     PA 741
 * 9.76     PA 23 (WT of overlap)
 * 10.48   PA 999
 * 10.74   US 222 (PA 272) S
 * 10.86   PA 72 N
 * 11.10   US 222 (PA 272) N
 * 11.84   PA 23 (ET of overlap)
 * 12.74   PA 340
 * 14.54   US 30
 * 17.03   PA 896
 * 25.92   PA 772
 * 26.32   PA 41
 * 26.66   PA 897
 * 31.10   PA 10
 * 31.50   US 30
 * 36.59   PA 82 (WT of overlap)
 * 37.00   PA 82 (ET of overlap)
 * 41.24   PA 340
 * 43.48   US 322 (WT of overlap)
 * 43.66   US 322 (ET of overlap) PA 282
 * 44.18   PA 113
 * 45.41   US 30
 * 47.98   PA 100
 * 50.29   US 202/US 30
 * 51.65  PA 352
 * 53.21  PA 401
 * 53.62  PA 29
 * 56.14  PA 252
 * 62.93  I-476
 * 63.26  PA 320
 * 69.35  US 1
 * 71.56  US 30
 * 73.04 US 13
 * 73.33 34th Street --  J A 10  Talk • Contribs 00:44, 3 July 2007 (UTC)

Macadamization and the Philadelphia-Lancaster Rd.
As John MacAdam did not develop his system of road building until 1816 when he used it on the Bristol Turnpike in England, it was not used on the Philadelphia-Lancaster Rd. Note that MacAdam, who had emigrated to the US during the American Revolution and become wealthy, returned to Britain after the Revolution. His new method of road building did spread rapidly--but not so rapidly that as to go backward in time to the building of the Philadelphia-Lancaster Rd. See the Wikipedia information on John MacAdam, which seems accurate. There seems to be general agreement that the first use of the MacAdam system in the US was on the Boonsborough [Boonsboro] to Hagerstown Turnpike in 1822-23 (part of the Cumberland Turnpike between Baltimore and Cumberland, MD) 70.109.69.217 21:16, 14 September 2007 (UTC)