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Each of the California sign specifications is assigned an alphanumeric designation and organized according to the same series found in the SHSM. The sign designation for a state-specific sign includes a "(CA)" after the sign number. The CA MUTCD also defines some state-specific series: [8] Series G: California Guide; Series SG: California ...
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Both parts were developed by the California Division of Highways (now Caltrans) for use on freeways in 1948–1950. Initially, the Division used all-uppercase Series E Modified for button-reflectorized letters on ground-mounted signs and mixed-case legend (lowercase letters with Series D capitals) for externally illuminated overhead guide signs.
These are "Type B Mandatory Signs" as prescribed by the Vienna Convention. In cases relating to particular types of vehicle traffic (e.g. buses), these signs are identical to some European prohibitory signs. [a] Canada uses a unique style of mandatory sign that features a green circle.
Bus lane: Bus stop: and: or: Train station [w] Airport or [w] Electric vehicle charging station Not used or [v] Freeway begins or or: or: Freeway ends or or: or: Customs post [x] [y] [w] Not used National highway shield(s) National border signs or speed limits Not used Not used Not used Not used Not used Not used - Not used varies
In the United Kingdom, a clearway is a road or section of road on which it is illegal to stop on the main carriageway for any reason except in an emergency. [3]Certain sections of urban road may be designated Urban Clearway, which is a little-used designation, but one which prevents vehicles being stopped during the peak hours, typically 07:00–09:30 and 15:00–18:00.
Regulatory signs and road markings are also defined in the TSM, but the regulations for them take precedence — the TSM simply provides guidance regarding the design and installation of signs and is not by itself a law. The most recent edition of the TSM was published in 2019 (along with some chapters updated in 2021 and 2024). [2]
Reflective lane markings will be wider and thicker, providing some of the tactile feedback the Botts' dots provided. [12] In California, highway lanes may be marked either solely by Botts' dots, or dots placed over painted lines. Four dots are used for broken lines on freeways, and broken lines on surface streets may use only three dots.