The sole exception to the illegality of metric road signs in the UK is that dual-unit height restriction signs are permitted in place of Imperial only. (I believe this also applies to length and width restriction signs as well.)
As it happens, the latest ruling from the Department for Transport is a step backwards under the Conservative government. Labour (while still in power) had proposed mandating dual-unit height restriction signs to reduce the frequency of costly bridge strikes caused by truck drivers from the Continent. The Tories seem more interested in making a political point than saving money and improving road safety. :-( -- Ezra ----- Original Message ----- From: "John M. Steele" <jmsteele9...@sbcglobal.net> To: "U.S. Metric Association" <usma@colostate.edu> Sent: Tuesday, December 27, 2011 3:40:43 AM Subject: [USMA:51372] Re: Gasoline prices in Puerto Rico Liters are legal for fuel in the US; they just haven't been used except for a brief period when prices first went over $1/gallon. When the pumps were modified to handle higher prices, everyone returned to the gallon as the unit. I think the 1979 date below is when liters were added, but I'm not going to look for prior editions. Note that liters are listed first (anti-alphabetically) as the Federal government weakly pushes metric against State and consumer resistance, but refuses to "man up" and mandate it. (The opposite of the UK where the national government declares local council's metric road signs to be illegal.) NIST Handbook 44, Section 3.30 (Liquid Measuring Devices) says in part: S.1.2.1. Retail Motor-Fuel Devices. – Deliveries shall be indicated and recorded, if the device is equipped to record, in liters or gallons and decimal subdivisions or fractional equivalents thereof. (Added 1979) --- On Sun, 12/25/11, Pierre Abbat <p...@phma.optus.nu> wrote: From: Pierre Abbat <p...@phma.optus.nu> Subject: [USMA:51371] Gasoline prices in Puerto Rico To: "U.S. Metric Association" <usma@colostate.edu> Date: Sunday, December 25, 2011, 7:53 PM I recently took a trip to Puerto Rico. While there, I noticed that gas prices are in dollars per liter, and took this picture. The mill's digit is 7, which I haven't seen anywhere else. This station is at the corner of Kings Court (which turns into something else there) and Calle Loiza, Condado (or maybe Santurce; I walked several blocks the wrong way on Loiza and found myself at a pharmacy which, according to a bag in my uncle's bathroom, is in Santurce). This may have implications on the legality of displaying prices per liter in the States. On the way back to the airport, I saw a clearance sign in feet and inches. The camera was in the trunk, so I didn't take a picture. Pierre -- sei do'anai mi'a djuno puze'e noroi nalselganse srera
