Regular expression that matches a WA state route ID

waroute.js

 // This RegEx should match any valid state route identifier.
var _SR_REGEX = /^(\d{3})(?:((?:AR)|(?:C[DI])|(?:C[O])|(?:F[DI])|(?:LX)|(?:[PQRS][\dU])|(?:RL)|(?:SP)|(?:TB)|(?:TR)|(?:PR)|(?:F[ST])|(?:ML))([A-Z0-9]{0,6}))?$/i;

/*
==RRTs (Related Roadway Type)==
AR Alternate Route 
CD Collector Distributor (Dec)
CI Collector Distributor (Inc)
CO Couplet 
FI Frontage Road (Inc) 
FD Frontage Road (Dec) 
LX Crossroad within Interchange
RL Reversible Lane 
SP Spur 
TB Transitional Turnback 
TR Temporary Route 
PR Proposed Route 

===Ramps===
P1 - P9 Off Ramp (Inc)
PU Extension of P ramp
Q1 - Q9 On Ramp (Inc)
QU Extension of Q ramp
R1 - R9 Off Ramp (Dec)
RU Extension of R ramp
S1 - S9 On Ramp (Dec)
SU Extension of S ramp

==Ferries==
FS Ferry Ship (Boat) 
FT Ferry Terminal 

*/
// Setup a validation method for state routes.
$.validator.addMethod("waroute", function(value, element) {
	return _SR_REGEX.test(value);
});

waroute.py

"""This module contains regular expressions for use with state route identifiers.
"""
import re

routeIdRe = re.compile(r"(?P<SR>\d{3})(?:(?P<RRT>[\w1-9]{2})(?P<RRQ>\w{0,6}))?", re.IGNORECASE)
# This re will only match the ID if it is that of a route.
rampRe = re.compile(r"(?P<SR>\d{3})(?:(?P<RRT>(?:C[ID])|(?:[PQRS][U1-9]))(?P<RRQ>\w{0,6}))", re.IGNORECASE)